HEALING FAST

Old Testament scripture

EXODUS 34:28 KJV - He (Moses) was there with the Lord 40 days & 40 nights. 
Neither did he eat bread nor drink water. 

DEUTERONOMY 9:18-20 NKJV -
18"I (Moses) fell down before the Lord, as at the 1st, 40 days & 40 nights. 
I neither ate bread nor drank water, because of all your sin which you committed in doing wickedly in the sight of the Lord, to provoke Him to anger. 
19For I was afraid of the anger and hot displeasure with which the Lord was angry with you, to destroy you. 
But the Lord listened to me at that  time also."

2nd SAMUEL 12:13-18,20 KJV  David said to Nathan, "I have sinned against the Lord."  Nathan said to David, "The Lord has put away your sin.  You shall not  die.  However, because by this deed you have given great occasion to the enemies of the Lord to blaspheme, the child that is born to you shall surely die."  Nathan departed to his house. 
The Lord struck the child that Uriah's wife bore to David.  It was very sick.  David besought God for the child, fasted, went in & lay all night upon the earth.  The elders of his house arose & went to him, to raise him up from the earth. 
He would not; neither did he eat bread with them. 
It came to pass on the 7th day that the child died... Then David arose from the earth, washed, anointed himself, changed his apparel, came to the house of the Lord & worshiped.

1st KINGS 13:8-9 KJV - (Elijah) The man of God said to the king (Jeroboam), "If you give me half of your house, I will not go in  with you; neither will I eat bread nor drink water in this place. 
The Lord charged me saying, "Eat no bread, nor drink water, nor turn a gain by the same way that you came."
1st KINGS 19:8 KJV - The  angel of the Lord came again the 2nd time, touched him (Elijah) & said, "Arise and eat, because the journey is too great for you. 
He arose, drank, & went in the strength of that meat 40 days & 40 nights to Horeb the mountain of God.
1st KINGS 21:20-21,27-29 KJV - (King) Ahab said to Elijah, "Have you found me, O my enemy?" 
He (Elijah) answered, "I have found you."  (The Lord says), "Because you have sold yourself to work evil in the sight of the Lord, I will bring evil upon you & will take away your posterity...."When Ahab heard those words, he rent his clothes, put sackcloth upon his flesh, fasted, lay in sackcloth, & went softly.  The word of the Lord came to Elijah the Tishbite, saying, "See how a Ahab humbles himself before Me?  Because he humbles himself before Me, I will not bring the evil in his days, but in his son's days will I bring evil upon his house.  (Spiritual insight: clear case study of generational sin.)

2nd CHRONICLES 7:13-14
2nd CHRONICLES 20:3 KJV - 
(King) Jehoshaphat feared, set himself to seek the Lord, & proclaimed a fast throughout all Judah.

EZRA 8:21 KJV - Then I (Ezra) proclaimed a fast there, at the river of Ahava, that we might afflict ourselves before our God, to seek of Him a right way for us, & for our little ones (children), and for all our substance (possessions).

NEHEMIAH 1:4 KJV - When I (Nehemiah) heard these words, I sat down, wept, mourned certain days, fasted, & prayed before the God of heaven.
NEHEMIAH 9:1-3 KJV - In the 24th day of this month, the children of Israel were assembled (in Jerusalem) with fasting, sack clothes & earth upon them. 
The seed (descendents) of Israel separated themselves from all strangers and stood & confessed their sins AND the sins of their fathers.  They stood up in their place & read in the book of the law of the Lord their God 1/4 part of the day. 
Another 4th part they confessed & worshiped the Lord their God.   

ESTER 4:15-16 KJV - Ester bid them return Mordecai this answer, "Go. Gather together all the Jews that are present in Shushan.  Fast for me.  Neither eat nor drink 3 days and 3 nights.  I & my maidens will fast likewise. 
I will go in to the king, which is not according to the law.  If I perish; I perish."

ISAIAH 58:3-9,14 NIV - "Why have we fasted,"  they say, "& You have not seen it? 
Why have we humbled ourselves & You have not noticed?"  (response) "On the day of your fasting, you do as you please & exploit all your workers.  Your fasting ends in quarreling and strife & in striking each other with wicked fists. 
You cannot fast as you do today & expect your voice to be heard on high. 
5Is this the kind of fast I have chosen, only a day for a man to humble himself? 
Is it only for bowing one's head like a reed & for lying on sackcloth & ashes? 
Is that what you call a fast, a day acceptable to the Lord? 
6Is not this the kind of fasting I have chosen:
to loose the chains of injustice & untie the cords of the yoke, to set the oppressed free & break every yoke? 
7Is it not to share your food with the hungry & to provide the poor wanderer with shelter. 
When you see the naked, to clothe him, & not to turn away from your own flesh & blood? 
8Then your light will break forth like the dawn & your healing will quickly appear..." the mouth of the Lord has spoken.

DANIEL 10:2-21 NIV - I, Daniel, mourned for 3 weeks (21-23 days).  I ate no choice (pleasant) food (bread). 
No meat (flesh) or wine touched my lips.  I used no lotions (anointing oil) at all until the 3 weeks were over. 
4Now, on the 24'th day of the 1st month...
5I lifted my eyes and looked, and behold a certain man clothed in linen, whose waist was girded with gold of Uphaz. 
6His body was like beryl, His face like the appearance of lightning, His eyes like torches of fire, His arms & feet like burnished bronze (brass) in color, & the sound of His words like the voice of a multitude...
9I heard the sound of His words; & while I heard the sound of His words, I was in a deep sleep on my face, with my face to the ground. 
10 Suddenly, a hand touched me, which made me tremble (lifted up) on (to) my knees & on the palms of my hands. 
11He said to me, 'Oh Daniel, man greatly beloved, understand the words that I speak to you & stand upright, for I have now been sent to you'...
12He said to me, 'Do not fear, Daniel, for from the 1st day that you set your heart to understand, & to humble yourself before your God, your words were heard.  I have come because of your words. 
13But the prince of the kingdom of Persia withstood me 21 days; and behold, Michael, 1 of the chief princes, came to help me, for I had been left alone there with the (evil) kings (rulers) of Persia.  14Now I have come to make you understand'...
20Now I must return to fight with the prince of Persia; & when I have gone forth, indeed the prince of Greece will come.  21But I will tell you what is noted in the Scripture of Truth. 
[None upholds me against these (evil spirits/demons/powers), except Michael your prince.]
(Spiritual insight: 21 days coming + 21 days back = 42 days.  God often recommends either 21 or 40 day fasts.)

JOEL 1:14 KJVer - Sanctify you a fast; call a solemn assembly; gather the elders & all the inhabitants of the land into the house of the Lord your God & cry to the Lord.
JOEL 2:12 KJV - Now, says the Lord, "Turn to Me with all your heart, with fasting,
weeping and mourning.  Rend your heart and not your garments. 
Turn to the Lord your God, for He is gracious, merciful, slow to anger and kind (to him who) repents of evil."

New Testament Scripture

MATTHEW 4:4 - Man does not live on bread alone, but on every word that comes from the mouth of God.
MATTHEW 6:6 - When you pray, go into your room, & when you have shut your door, pray to your Father Who is in the secret place.  Your Father Who sees (you) in secret will reward you openly.
MATTHEW 6:17-18 KJV -
When you fast, anoint your head & wash your face, that you appear not to men to fast, but in secret to your Father. 
Your Father, Who sees (you) in secret shall reward you openly.
MATTHEW 15:32 TLB - Kwikscan - Jesus Called His disciples to Him & said, "I pity thee people. 
They've been here with Me for 3 days now & have nothing left to eat.
I don't want to send them away hungry or they will faint along the road."
MATTHEW 17:14-16 KJV - There came to Him a certain man, kneeling down to Him, saying, "Lord have mercy on my son, for he is a lunatic & sore vexed.  Often He falls into the fire & into the water. 
I brought him to Your disciples & they could not cure him."
MATTHEW 17:17 KJVer - Jesus answered, "O faithless (unbelieving) & perverse (perverted) generation, how long shall I be with you?  How long shall I endure you?  Bring him here to Me."
MATTHEW 17:18 KJV   Jesus rebuked the devil, who departed out of him.  The child was cured that very hour (moment).
MATTHEW 17:20-21 KJV - 20"(Because of your little faith,)" I (Jesus) say to you, "If you (believe) have faith as a grain of mustard seed, you shall say (speak aloud) to this mountain, 'Remove here to yonder place'; & it shall remove. 
Nothing shall be impossible to you.  [21However this kind does not go out, except by prayer & FASTING." (This "kind" may refer to deliverance of (specific/epilepsy) demons/exorcism &/or pertain to always being prepared via a lifestyle of fasting.)]  (Spiritual insight: Verse 21 was NOT in earliest manuscripts, per TPNT.   Ndifon www.christlove.org contends that fasting is mainly to hear God better, rather than for power; whereas Chavda www.watchofthelord.com fasts frequently for power.)

LUKE 2:37 - This woman was a widow of about 84 years who did not depart from the temple, but served God with fastings and prayers night & day.
LUKE 4:2 KJV  - Jesus, being full of the Holy Ghost, returned from Jordan & was led by the Spirit into the wilderness, being (at the end of - per TPNT footnote) 40 days tempted of the devil.  In those days He did eat nothing. 
When they were ended, He afterward hungered.

JOHN 4:31-34 KJVer - 31His disciples prayed (urged) Him saying, "Master, eat." 
32But He said to them, "I have meat to eat that you know not of." 
33Therefore said the disciples one to another, "Has any man brought Him anything to eat?"
34Jesus says to them, "My meat (spiritual nourishment/food) is to do the will of Him Who sent Me & to finish His work."

ACTS 10:30-31 KJV - Cornelius said, "4 days ago I was fasting until this hour.  At the 9th hour I prayed in my house.  Behold, a man stood before me in bright clothing, & said, 'Cornelius, your prayer is heard. 
Your alms are remembered in the sight of God.'" 
ACTS 13:2-3 KJV - As they ministered to the Lord & fasted, the Holy Ghost said, "Barnabas & Saul separate (unto) Me  for the work to which I have called them. 
After they had fasted & prayed, they laid hands on (commissioned) them & sent them away.
ACTS 14:23 KJV - When they had prayed with fasting, & had ordained the elders in every church, they commended them to the Lord, on Whom they believed.

2nd CORINTHIANS 6:4-7 NIV - As servants of God we commend ourselves in every way: in great endurance, troubles, hardships, distress, beatings, imprisonment, riots, hard work, sleepless nights, & hunger (fasting=KJV).

Commentary #1

Corrie Ten Boom in Tramp for the Lord has a chapter on Authority Over Demons. 
The movie The Hiding Place is her autobiography of her internment during the holocaust. 
She begins chapter 10 with Mark 16:17 "These signs shall follow them that believe; in My name shall they cast out devils" 
...At that time the Communists did not allow people to speak about demons.  However, God had told Corrie to use her authority in the Name of Jesus.  Corrie was afraid of the local authorities but nonetheless willing to obey Mark 16:17.  
She told the congregation that the servants (demons) of Satan were keeping them in bondage (wanting to receive Christ, but unable).  Then she said aloud, "In the Name of Jesus I command all dark powers keeping people from the blessings of God to disappear. 
Go away.  Get out of the hearts of these people.  Get out of this church.  Go to the place where God sends you." 
Guess what?  The people were free at last to receive Christ into their hearts. Corrie went on to expound on missionaries who have given all but "not taken all the boundless resources of God's promises. Many do not know about 2 precious weapons: the power of the blood of Jesus & every Christian's legal right to use the wonderful Name of Jesus to cast out demons."  Corrie recommends fasting as part of armor of God. 
In Ravensbruck when they were starved, she & her sister reversed the lack of food to a FAST for God, which resulted in their having power to cast tormenting demons out of their barracks.

Commentary #2

Fasting is often part of the protocol of doing ministry.  However, Christ was criticized for His disciples not fasting. 
His response was that they would fast after the bridegroom was gone...
Roberts Liardon - God's Generals - www.robertsliardon.com Liardon shares the lifestyle of 12 men who operated in God's healing anointing - Dowie, Woodworth-Etter, Roberts, Parham, Seymour, Lake, Wigglesworth, Semple-McPherson, Kuhlman, Branham, Coe, & Allen. 
Some fasted daily due to poverty and dedication to God's calling, but most fasted frequently, especially before & during ministry...
Fasting was what the Holy Spirit called Jesus to do for 40 days at the inception of His ministry...
The temptation by Satan of Jesus in the desert consisted of 3 tests: spirit, mind, body. 
The 1 regarding His body was intended to sabotage Jesus' fast.  Jesus won that battle...
The 1st temptation of mankind involved food, the forbidden fruit in the garden of Eden. 
Both Adam and Eve lost that battle.
One can begin to get a glimpse of the relationship between sin, spirit & body. 
Spiritual wars have been won through fasting (not eating food or not sinning) & lost through lack of fasting [giving in to hunger/appetite/desires/thoughts (our own or our accepting the thoughts/deceptions of others)]...
We can abstain from food or we can abstain from (venial/mortal) sin (such as gossip/tattling/ ratting/squealing/sharing confidences/family secrets).  Prayer lines can be gossip lines. 
When sin is put under the blood, then leave it there.  Do not take it out & inspect it. 
Do not hang your own or another's dirty laundry out on the line for neighbors to see & talk about.  Compulsions are of the enemy.  If we NEED an emotional fix, it is not we but the enemy who is looking for attention.  Satan is the accuser. 
God is the forgiver.  Satan is the 1 who wants to air the dirty laundry. 
Satan is the 1 who wants the alcohol, the drug, the pill, the fix, the candy.  Put/leave that impulse under the blood...
Tell the temptation, "Go in the name of Jesus."  Call a friend.  Go to church.  Take a walk. 
Do a good deed.  This is war!  Fasting is not a holy day of obligation.  Fasting is a life style. 
Fasting is war against the enemy in our life.  Not a chess game.  War.

Books

Allen, AA - (1911-1970)  God's Guarantee to Heal You   republished by   www.schambach.org - Caption - Thus Saith the Lord, the God of David thy Father, I have heard thy prayer; I have seen thy tears.  Behold, I will heal thee. 
King James Version - "Prayer and fasting should be an important part of your preparations for healing.
Chapter 13 The Price of God's Miracle-Working Power - a summary of book by same name When Allen, a Methodist turned Pentecostal, had his wife lock him in a closet to pray & fast, God came to him & revealed 13 things blocking His miracle working power in his ministry. 
11 of those things he shares in his book.
Allen, AA - The Price of God's Miracle-Working Power    www.schambach.org 
Chapter 2 The Disciple IS Not Above His Master   "The Son of God spent long hours alone with His Father in order to cast out demons.  He said, 'This kind goeth not out buy by prayer & fasting' (Matthew 17:21). 
So surely His disciple must also spend hours in fasting & prayer, waiting upon God & learning to think & at in unison with God, before he can expect to cast out such demons.  Men ought always to pray, & not faint (Luke 18:1).  
Persistent habitual prayer...is the cause - miracles the result...If the disciple could attain the same results as Jesus did without paying the same price, the disciples would be greater than his master...
The student of Jesus Christ CANNOT become greater than his teacher. 
He cannot learn anything Jesus does not know.  He cannot find a shortcut to power with God."

Almonte, Tommy  - The God That I Know, A  Journey to Intimacy - www.creationhouse.com -
Almonte shares that he spent 1 hour each day in prayer, but that God asked him AND his wife to spend one whole day each week also in prayer plus fasting. See chapter 5.

Axe, Josh, & Rubin, Jordan @ https://www.amazon.com/Essential-Fasting-Discover-Radically-Transform/dp/0768454727 Chapter 1

Baker, Rolland and Heidi - There Is Always Enough - www.irismin.org - www.sovereign-world.com -
2005 edition delves into fasting at the end of the book.  It is a "lifestyle" for His purposes.
Baker, Rolland and Heidi - The Hungry Always Get Fed - www.newwineministries.co.uk
This book is about spiritual hunger & how one needs to hunger after God.  It is about His accomplishing in us what He wants, rather than our fasting to achieve/accomplish our goals.
Baker, Heidi - Compelled by Love - www.irismin.org - Chapter 6 Blessed Are the Pure in Heart 
"I would never tell my kids to go 3 weeks without eating before I would talk to them...
We fast to be more hunger for Him, not to twist His arm" nor "gain more favor from God." 

Bentley, Todd - The Reality of the Supernatural World - Exploring Heavenly Realms & Prophetic Experiences - www.soundoffire.com - Chapter 7 Ministering Under an Open Heaven  reminds us to pray and fast.

Bright, Bill - Steps to successful Fasting & Prayer - www.ifabooks.com

Brooks, Steven - book  Working with Angels - www.stevenbrooks.org - Subtitle - Flowing with God in the Supernatural   Chapter 10 Reflections on Prayer and Fasting shares the apparition/vision of 2  angels + Jesus Christ inside a car where Steven was praying.  It is "spiritually productive & physically healthier to live a fasted lifestyle. 
A fasted lifestyle is choosing to never eat all you want...Fasting does not change God...Fasting changes us."
Steven Brooks 4/28/2008
Steven Brooks 2009 4/13/2009
Steven Brooks - Anointing 4/28/2010
Steven Brooks - Nuclear Power 4/30/2012 - Fasting Prayer -
"When you fast & pray...1 thing...that speeds up is God's going to work on your behalf."  We progress from waiting on, to waiting with the Lord, before HE acts/manifests on behalf of us/others.  Preceding certain events/causes Steven dials "down...food intake to only eating almonds & cashews while drinking just water & an occasional coffee."
Chapter 10 21 Day Fast Diary - John G Lake writes, "On the night of the 6th day of this fast that the Lord had laid on me, while in the act of washing my hands, the Spirit said, 'How long have you been praying to cast out demons?'
I replied, 'Lord, a long time.'  The Spirit said, 'From henceforth, thou shalt cast out demons.' 
I arose & praised God... The following Sunday...a violently insane man was brought to Lake, who commanded the demon to come out of him in Jesus' name. 
The man was instantly delivered, & 2 days later was released from the institution that he had been confined in."

Brown, Catherine - Confessions of a Fasting Housewife - http://www.glory-of-zion.org

Brown, Ruth - Destroying the Works of Witchcraft Through Fasting - http://www.lakehamiltonbiblecamp.com/books/deliverd.htm

Burroughs, Stanley - The Master Cleanser with Special Needs and Problems -
"I am very much opposed to several days or weeks of water fasting...You may live an active, normal life...while on the (10 day) lemonade diet (in book)...After one has attained a clean, healthy body, & then desires to fast for purely spiritual reasons, 30 or even 40 days can cause no harm.  1st we must build our physical bodies to their highest condition."
(Some of author's ideologies may lean toward occult.)
RECIPE
2 Tablespoon raw organic lemon/lime juice (approx 1/2 lemon)
2 Tablespoon organic maple syrup
1/10 Tablespoon organic cayenne pepper (or to taste)
Distilled/spring/pure warm water.
Combine juice, syrup & pepper in a 10 oz glass; will with water.
Consume 6-12 glasses during day for 10-40 days, 1-4 times a year, until toxins are removed;
former coated and fuzzy tongue (showing evidence of toxins being discharged)
will become clear pink and clean looking, not coated.

Campbell, Wesley & Stacey - Praying the Bible - the Pathway to Spirituality - www.prayingthebible.com
Chapter 3 Pray Every Day  "The Jews.  They fast on Monday & Thursday." 
Thus Catholics were admonished to "fast on Wednesday & Friday," instead.

Chavda, Mahesh - The Hidden Power of Prayer and Fasting - www.watchofthelord.com
http://www.amazon.com/The-Hidden-Power-Prayer-Fasting/dp/0768424100#reader_0768424100
read online chapter #1 What Is the Answer for Stevie? (with Down's syndrome)
Mahesh did 1, 7, 13, 14, 21, & 40 days fasts, & continues to do them, as the Lord leads. 
His 1st fast began with 3 days of neither food nor water, followed by 13 days of water only. 
Day 14 he was allowed to pray for Stevie, resulting in Stevie's healing from Down's syndrome & self-mutilation. [This 3 day fast might be looked upon as (1) Christ was buried in the tomb 3 days/nights, (2) Jonah was in the belly of the giant fish 3 days, & (3) there are 3 persons in the Trinity. (Sometimes to undo a curse, things need to be done/said 3 times, to counteract the counterfeit activity of Satan.  Some prayers we need to repeat 3X in order to break curses or linkages to evil that have been invoked 3X to blaspheme the Trinity. 
We can pray to end a curse: in the name of the Father; repeat the prayer in the name of the Son.
Repeat prayer again in the name of the Holy Spirit. 
Otherwise, we can repeat the prayer 3x, each time ending with: in the name of the Father, Son & Holy Ghost/Spirit. 
Actually we can/should command "the curse" to be broken, rather than asking God to do it. 
"Curse, be broken, in the name of the Father, Son, & Holy Spirit"...
Regarding the 21 day fasts, one can refer to when Daniel sought the Lord and got a message from an angel that he had been fighting his way to bring a message to Daniel.
Daniel 10:12-14 - 12He said to me, "Fear not, Daniel, for from the 1st day you set your heart to understand & chasten (perhaps by fasting?) yourself before God, your words were heard.  I have come because of your words (prayers). 
13The prince (strongman/evil-spirit/ Satan's representative) of the kingdom of Persia withstood me 21 days...
Lo, Michael, 1 of the chief princes (holy angels) came to help me & I remained there with the kings of Persia. 
14Now I have come to make you understand."  Most know that Jesus was tempted by Satan after a 40 day fast.
See Matthew, chapter 4.)]
Mahesh says, "For the first 19 (of 29 40-day fasts), I limited my intake to water only. 
After that, the Lord allowed me to drink juices."   (The quote does not appear to mean water only for 19 days, followed by juice 21 days for a total of 40 days.)  (An aside, eating was part of the original road to sin by the first people, Adam & Eve.  Eating (pacifying one's emotions/appetite) may be a giant vulnerability in the human race. 
That may be part of the reason why fasting is so effective in the spiritual world.)
Chavda, Mashesh - The Hidden Power of the Believer's Touch  www.watchofthelord.com   
Chavda tells of a 40 year old mentally ill patient being delivered. 
Chavda, Mashesh - Only Love Can Make a Miracle - When God's Power Takes Hold of a Man, It Can shake the World - www.watchofthelord.com   
Chapter 9 By Prayer and Fasting shares that there is a "spirit of mutilation," which can be commanded out "in the name of Jesus" after one fasts in addition to prayer.  (Healing & deliverance are not the same.) "When we pray for healing, we may not always get the answer we want, (the way we want or when we want), but we can always trust Jesus. 
We can release into His care the things that trouble us."
Chapter 13 The Sorcerer's Tree shares, "Prayer and fasting; it has been the undergirding of my ministry...
During my fasts, it is not uncommon for God to give me special words of  revelation & insight into His mind - sometimes about situations that have stumped me...I have made it a regular practice to go on two 40 day fasts each year...as well as two 21 day fasts...Often...the Lord would give me a special prayer assignment for that fast."
Chapter 15 Set the Nations Free asks us to "Pay the price of prayer & fasting."

Cho, David Yonggi - Successful Home Cell Groups - www.bridgelogos.com publisher -
Chapter 12 Importance of Fellowship with the Holy Spirit shares that no one should fast without a specific goal. 
His congregation has the habit of frequent 1 & 3 day fasts, especially at Prayer Mountain retreat, Yoido Full Gospel Church, Seoul, Korea.

Colbin, AnneMarie - Food and Healing - www.amazon.com - Colbin addresses 4 fasts - (a) daily, (b) to the 9th hour, (c) 1+ days, (d) and 1+ weeks, plus 3 methods - (a) water, (2) juice and broth, and (c) mono-diet.  She discourages fasting while on medication, because the body becomes supersensitive.  Water only fasts are discouraged due to the high level of water contamination AND because the body fat releases stored poisons into the bloodstream during such a fast.

Contreras, Dr Francisco - Coming Cancer Cure - book - www.oasisofhope.org -  His dad (an MD) founded Oasis of Hope hospital in Mexico on the California border.  Father & son are oncologists.  Patients are evaluated for spiritual, physical & psychiatric/emotional problems, are introduced to Christ, & are prayed for.  Clinic uses methods that are not FDA approved & has a high recovery rate.  Francisco believes that 1% of cancer is demonic.  He believes the bulk of cancer is from environment, clothing, & processed foods (sodas, bottled water, artificial sweeteners that cause brain damage, etc). 
Some terminal patients they are able to cure by conventional & alternative methods.  If the patient comes to them on his death bed with all immunity gone due to chemo-therapy, etc, then the last resort is only prayer & fasting by the staff for the patient.  Amazingly, the results are often miraculous. 
Francisco says that one's prayers are answered according to one's expectations.

Copeland, Kenneth - John G Lake - www.kcm.org - Lake shares in chapter 31 The Power of Divine Healing that his co-worker in S Africa prayed & fasted for days under a thorn tree for the end to a fever epidemic that had killed a quarter of the population in 1 month  in an area of 350 miles.  That man prayed until he at last needed prayer support. 
They witnessed a flock of demons, which his prayer partner cursed back to where they had come from.  Immediately the epidemic stopped. 

Dickow, Gregory - From the Inside Out - A Revolutionary 40-day Fast From Wrong Thinking - www.changinglives.org
Dickow, Gregory - Revolution - from the Inside Out - http://fromtheinsideout.us/
"Revolution - Day #1 - Today we’re fasting from the thought that says, 'I Can’t Change.'
We’ve all felt at times like we can’t change a certain (bad/negative attitude, behavior, feeling, reaction,) habit, or a characteristic about ourselves...That’s what this fast from wrong thinking is all about. As we change our thought patterns and mindsets, ANYTHING can change. And changing our mindsets is simply a process of replacing defective thoughts with biblical mindsets. So, if you’ve felt like you can’t change, you CAN...CHANGE IT TODAY:
1. Believe that the power to change is a GIFT. 2 Timothy 2:25 says God grants ‘repentance’, or ‘the power to change’, as a gift.  The ability to experience lasting change in any area of our life is a gift from God.
2. Receive the gift of repentance or 'the gift to change', by FAITH.
Believe that every good gift comes from the Father (James 1:17).
3. All change begins by believing you are loved by God.
Romans 2:4b says, Don't you realize that it is God's loving kindness that is trying to lead you to Him and change the way you think and act? (God’s Word Translation).
4. Notice in that verse His love & kindness changes the way we think; THEN it changes the way we act.
All lasting change begins by surrendering my thought life to the Word of God (Romans 12:2).
5. Believe in the process that leads to progress. Don’t worry if it doesn’t happen right away.
Jesus touched the blind man once, than touched him again, before he was completely healed (Mark 8:22-26).
6. Re-define yourself ONLY as what God says about you. Disconnect from past definition of your habits, traits & limitations. You are being changed into His image. (2 Corinthians 3:18)
THINK & SAY IT (out loud): 'God has given me the gift to change.
I can change my habits, emotions and life by changing the way I think.
I submit to the process of renewing my mind. I expect divine progress & supernatural change. I believe the love that God has for me, & that produces change in me. I refuse to accept past definitions & limitations of myself.
As I embrace God’s view of me through the mirror of His Word, I am being changed into His image, in Jesus’ Name.'  In His Great Love, Gregory Dickow."
Dickow, Gregory - NEWSLETTERS containing some of the 40 day fast daily manna encouragements http://community.icontact.com/p/gregorydickowministries/newsletters/fromtheinsideout1

Duggan, Dorman with Hammond, Frank - The Strong Man of Unbelief - Whose Report Will You Believe? - www.thechildrensbread.net - Authors contend that neither the Greek nor the NIV translation of the Bible report Jesus requiring His disciples to fast in difficult cases. [MATTHEW 17:21 KJV   However this kind does not go out, except by prayer & FASTING."]  Fasting is often an excellent thing to do, but in this instance the root issue seems to be the LACK of BELIEF.  We all agree, that mental illness & epilepsy, in addition to demonization, can be very very intimidating. 
The authors suggest that rather than the disciples being failures, it was the failure of the Nazareth citizens: the failure to BELIEVE. [Mark 6:1,4- KJV] 1He went out from there & came into His own country.  His disciples followed Him...
4Jesus said, "A prophet is not without honor, but (except) in His own country, among His own kin, & in His own house." 
5He could do NO mighty work, save that He laid His hands upon a few sick folk & healed them. 
6He marveled because of their UNBELIEF...
Matthew 17:19-20 KJVer  Jesus' disciples came apart & said, "Why could we not cast him out?" 
Jesus said, "Because of your UNBELIEF.  Verily I say to you, If you have faith as a grain of mustard seed, you shall say to this mountain, 'Move (from) here to yonder,' & it shall move.  Nothing shall be impossible to you."
Either the disciples' or the community's, UNBELIEF may have been the key handicap.

Eckhardt, John - Marine Demons - http://www.arsenalbooks.com/prodinfo.asp?number=1883927285 - http://www.impactnetwork.net - "Marine spirits are strong & some will only be defeated through fasting. 
Marine spirits are a different kind of demon...
Many mind-binding & mind-controlling spirits...have the form of a squid or an octopus. 
These spirits have tentacles that wrap around the minds of people hindering them from thinking clearly. 
These spirits cause much confusion & help blind people from seeing the truth."

Ferrell, Ana Mendez - Regions of Captivity - www.thevoiceofthelight.com - 
"Fasting"...sensitizes us to the spiritual world in order to hear & see" into the supernatural & helps us to pray "effectively under a prophetic anointing to deliver persons being held captive."

Ferrell, L. Emerson - Quantum Fasting - Food for Thought - www.thevoiceofthelight.com -
Aggressive fasting + keeping one's focus on the Trinity opens the portholes of heaven. 
The impression given to the reader that is that no one is truly born-again until he enters this porthole on a regular basis, somewhat like the marriage where one needs to consummate his marriage to have intimacy that is not legally/spiritually available during engagement or dating.
Chapter 4 Purposes and Benefits of Fasting -
"Take authority over physical appetites and...recapture territory previously stolen...Experience freedom from those prisons. 
Fasting is the quickest & most powerful way to break open doors holding you captive in your mind & body...
Fasting is THE principal tool to display your determination to retake what you have surrendered through ignorance...fasting is a lifestyle...The heavens will remain open in your life & mind.  For those who fast, the atmosphere created by the Holy Spirit...is the portal by which revelation enters our life & changes our consciousness...
(It) is the absolute necessity to fast in order to change one's current condition...
Every revelation of Christ we uncover unlocks treasures designed for our personal development & destiny."
Chapter 5 Quantum Fasting & the Supernatural - "Adam fell by opening his mouth to eat...
Be fed by the Holy Spirit...Eternity does NOT begin when we die...Christ is eternity & those who taste Him never die... Spiritual surgery (is) conducted by the Holy Spirit through fasting."
Chapter 7 Our Spirit Is His Key - "God smells a sweet aroma from our flesh 'burning' on the altar of fasting...
That condition creates a scent & a different frequency in our bodies...& becomes the vehicle for (better) understanding the spiritual nature of God."
chapter 9 Stones to Bread - "The eldest of Isaac, Esau, sold his covenant birthright (to Jacob) for food...
The Tempter came & said (to Jesus during His 40 day fast), 'If You are the Son of God, command these stones to turn into loaves'" (Satan said this in an attempt to derail God's pan to redeem mankind.)
Chapter 14 Old Wine Skins - "The original design of the body was created to live for 1,000's of years free from disease."
Chapter 15 Fasting Is Medicine - "Fasting is God's natural detoxification treatment...is medicine...no side effects...
The blood was designed by God to supply both physical life & spiritual DNA. 
The devil knows the power of blood, because it is what defeated him...
God required the Israelites to eat (& omit) certain foods to protect their blood as well as to provide proper nutrition."
Chapter 16 Fasting and Physiology - "Pharmaceutical drugs kill more people every year than are killed in traffic accidents... Over 75% of ADRs (adverse drug reactions) were dose-dependent...due to inherent toxicity of the drugs rather than to allergic reactions."
Chapter 18 Fasting Births Prophets - "Our physical world consists of material from the invisible realm. 
The spiritual world is invisible to our naked eye, because of the (faster) speed in which it moves...Foods are not just protein & carbohydrates but physical matter that...vibrate at different frequencies...(+) influence our...blood and cells."

Fluitt, Clarice - Chapter 1 @ https://www.amazon.com/Ridiculous-Miracles-Ordinary-Person-Extraordinary/dp/0990369412#reader_0990369412 -
Chapter 9 Moving Your Boundaries - "He said, 'I know somebody in  the body of Christ has been fasting. 
We are 1 body, so come on up & take their fast.'  I thought, 'Can you do that?'  I had to move my religious boundaries."

Franklin, Jentezen - Fasting - book #S 155

Hickey, Marilyn - Fasting and Prayer - www.mhmin.org
Hickey, Marilyn - The Power of Prayer and Fasting - www.mhmin.org
Hickey, Marilyn - Your Pathway to Miracles - Chapter 7 Miracles from the Prayer Closet -
"When my mother was 40 years old, she reached out to God to receive the baptism of the Holy Spirit out of desperation concerning my father's mental illness.  Because he was mentally broken, he'd become verbally & physically abusive...
Shortly after this, my father was admitted to a mental hospital, &d the doctors said he would never come out again. 
Yet my mother began to pray & fast, &, within 1 year, my father was healed...
She lived to be 90 years of age & prayed intensely for everything."
[Hickey, Marilyn - Shattered Mind NOT Demon Possessed - http://www.marilynandsarah.org/2012/03/jewish-feasts-part-1/ - Testimony begins at end approx 23:23 where Marilyn shares that William Branham http://www.williambranham.com/ told her mom to place her tear stained handkerchief on her husband to allow God to heal him, that he was NOT demon possessed but rather had a shattered mind. 
[Charles Capps was given similar revelation regarding ministry to some with mental issues.]

Hinn, Benny - The Miraculous Power Released Through Prayer & Fasting -  www.bennyhinn.org

Hogan, David - David has 8 booklets available from Sid Roth's Messianic Vision & includes http://www.healingandrevival.com/DHogan1.pdf How to Raise the Dead -
The series includes his typical dietary regime: 3 days fast from all food & liquids, then 3 days of eating, as a lifestyle.
Other links one might like: https://www.hopefaithprayer.com/word-of-faith/river-god-david-hogan/ or https://renewaljournal.com/2011/07/20/the-river-of-god-bynbspdavid-hogan/ + http://housechurchministriesforjesus.com/wp-content/uploads/2013/03/DavidHogan_Feb.13th-2011.pdf AUDIO - http://www.insightsofgod.com/downloads/david_hogan_1.wma + http://www.insightsofgod.com/downloads/david_hogan_2.wma  + http://www.insightsofgod.com/downloads/david_hogan_witchdoctor.mp3 + http://fuegodedios.com/record.htm + http://www.freedom-ministries.us/
@ http://www.insightsofgod.com/index.html (Good resource for many autobiographies & biographies) -
David Hogan has a lot of naysayers (as do many mighty men of God)

Irabor, George B - Dimensions of Fasting - Oct-Dec/2007 Grace Envoy magazine editorial - www.fountainofgracebos.org  Dedham, Massachusetts, USA - "If you fast at least 1 day a week, at the end of a year you will have fated for 52 days.  You will have tithed more than 10 % of your days to God...
CONSISTENCY in fasting helps to prepare you for the greater things in God's kingdom...
1-3 day fast aid in subduing fleshly problems...3-10 day fast aids in breaking yokes in your family...10-21 day fast aids in breaking...yokes over cites & nations...When fasting for long periods of time, it is prudent to let a spiritual authority or mentor know...to pray...you through any unforeseen physical or spiritual difficulties...When God has a burden, He looks for a man to SPEAK it & to birth it into existence."  Mention is also made of our not offending others by refusing to eat in their presence.  Use wisdom, mercy & kindness in dealing with others & self regarding whether or not to break or alter a fast.

Kelley, Earthquake - book #1122 "Bound to Lose, Destined to Win" - http://earthquakekelleyministries.org/books/ - Chapter 4 A Trip to Hell - Earthquake attended the Utopian Temple Church of God in Christ & was mentored under Pastor Joe Lee & Lucy Hughes who taught him about deliverance & empowered him to overcome demonic spirits. 
Pastor Lee "went on long fasts & cast demons out of people" including those who would rededicate their "life to Christ & backslide again."  Wisdom without power is of NO use.

Kunneman, Brenda - The Supernatural You - Living from the Well of God's Spirit within You www.ovm.org -  www.lohchurch.org - chapter 5 Supernatural Equipment Is in Your House -
Matthew 17:14-21  "Jesus wasn't saying that every time you meet up with this kind of demon you need to...go out & fast & pray 1st.  He was saying that by making a habit of prayer & fasting, you position yourself to walk in the kind of faith needed."

Lim, Jim – Chapter 8 on Fasting - http://www.jesushealsmi.com/Books/FAP_E/FAP%20Ch8.pdf

Lowery, TL - Walking in the Supernatural - book - www.tllowery.org/ - Web interview: http://video.google.com/videoplay?docid=3330728582264121859 - www.deeperliving.com - At end of a 40 day water fast, a healing cloud manifested over those congregants who were subsequently healed & delivered.

Allen, Bruce - http://www.lchealingrooms.com/wp-content/uploads/2009/04/bruce-allen-december-3-friday-pm.pdf
"In Malaysia they take children from 4 years old up to teenagers, they go on week-end retreats, they are fasting & prayer retreats. Not little Bible school, let’s go have fun & games retreats. They’re fasting and praying, do you know who they’re fasting & praying for?...You. I kid you not. They’re praying for America; they’re weeping for America. 
This little boy went because his parents made him go. He was very sad & dejected & as he’s laying on his face praying, or trying to pray…wham! He’s caught up into the 3rd heaven for over an hour. He has an experience with God that radically changed & transformed his life so much so that he came back from that week-end; in those schools over there you test out of every grade it’s a national thing. He took his test & was the 3rd highest in all the schools.
It’s not that he didn’t study, whatever came on him, he just wasn’t retaining…but God…
He came back & can quote the Bible from Genesis to Revelation. He preaches like nobody you’ve ever known.
He’s just a kid, you can play & have fun, but when you start talking about God it’s like this mantle of the wisdom of the ages comes on him. He said this, 'He’s coming back sooner than you think.'
Every 1 of those little kids we’ve ever heard about has this same theme, no matter what their experience.
He’s coming back sooner than you think. It’s the parousia:
A sign to us, this ever increasing presence of God that shortly now, it’s finished. You have a profound destiny in God.
You’re destiny is NOT (cocky) 'blessed assurance, this seat is mine', oh what a foretaste of death on the vine."

Alston, Venner - 40 Day Fast Declarations
http://aoimf.org/church-newsletter/3-2017-cleansing-fast-pdf/file?tmpl=component
(Perhaps one could fast 6PM-6AM instead of 6AM-6PM or even 2 days on & 2 days off, which Alston practices.)
Alston, Venner - https://drvjalston.org/ignite-blog/
Alston, Venner - https://ofm6z46z825qpxk83fa00q1a-wpengine.netdna-ssl.com/wp-content/uploads/2019/10/IS1024Transcript_Alston.pdf  12/30/2019 @ https://sidroth.org/television/tv-archives/venner-alston/?src=banner_tv  - "We began to notice is that after I became a believer, I started noticing that because I had a cycle of prayer. I'd pray 2 days, I'd fast 2 days. I'd eat.  Then I'd fast 2 days & I'd eat.  Well, what I discovered is that sometimes when people would walk up to me, I knew what they were going to say before they said it.
I didn't have a language grid so I didn't know how I knew that so I kind of started, kept that quiet.
But as I began to emerge & God began to restore prophetic language back to the body of Christ, I then had language that was a descriptor of what it was I was experiencing.
Then I could just continue to hear the voice of God & declare what I heard Him say in the spirit."

3/9/-4/30/2011 USA Catholic Missalette - Communal Anointing of the Sick "This sacrament gives the grace of the Holy Spirit to those who are sick: by this grace the whole person is helped (body, mind and spirit) & saved (from death, disease, damnation, demons & defect)... The word 'quarantine' literally means '40' days.  The 40 Days of Lent are for the Church a kind of healing retreat, a quarantine.  The Lenten disciplines of prayer, fasting & almsgiving have been called the 'medicines' that make the Church healthy."  Quarantine per Webster's (1979) New Universal Unabridged Dictionary -
"1.A period of 40 days...In English law...40 days during which the widow of a man seized of land had the privilege of remaining in her husband's mansion house, & during which time her dower was to be assigned. 
2.A period, originally of 40 days, during which a vessel arriving from an infected port, or being suspected of carrying a contagious disease on board, is detained in port in strict isolation."

Copeland, Kenneth - Fasting and Prayer - http://www.cfaith.com/index.php?option=com_content&view=article&id=13075:fasting-and-prayer&catid=50:prayer-&Itemid=67
(1) Decide the purpose of the fast.
(2) Proclaim the fast before the Lord.
(3) Believe you receive.
(4) Minister to the Lord.
(5) Minister to others. Always minister to others AFTER the fast. You need to use the spiritual power within you to meet the needs of people. If you fast according to the Word of God, you will be spiritually built up. Minister to others during the fast only as you are led of the Father to do so."

Finney, Charles - "When asked the secret to his success in the ministry, Finney simply said, 'The secret is prayer. 
I always get up at 4:00 in the morning, & I pray from 4:00 to 8:00 every morning...
I found myself quoting scripture after scripture to the Lord, reminding Him of His promises...
Finney pled his case with God for revival in the cities where he would be preaching based on the promises in God's Word...
There isn't one account given that Finney ever pulled down demonic strongholds, prayed against devils, or dealt with ruling princes over cities, yet whole town were won to the Lord where Finney preached."
Father Nash preceded Finney to each city where he fasted and prayed for days at a time...
Regarding the Texas region, Mother Howard is cited for preparing the soil.  "Mother Howard began praying, taking 1 town at a tie and continuing to pray until a Full Gospel church was  raised up in the town she was praying for. 
She'd pray from 10 AM until mid-afternoon. 
Then after supper, she'd begin praying again & continue until midnight or later, depending on how the Holy Spirit led her.  Mother Howard was praying for souls."
editorial Timeless Teaching of Kenneth E Hagin - Praying for the Harvest 7/2008 Word of Faith magazine.

Hall, Franklin - http://higherlifecentre.com/wp-content/media/2015/11/FranklinHallFastingPaper.pdf - 1/1946 -
"Many miracles of healing were performed by Holy Spirit in the Name of Jesus. Demons were cast out, lunatics healed, cancers disappeared, the blind saw, the crippled walked, stomach ulcers disappeared, palsy was quieted, tuberculosis healed, asthma, bronchitis, the smoking and drinking habits were given up & many more sicknesses vanished.
Scores of folk were baptized at the altars." 
"1 day while in deep consecration the Spirit spoke (to T.L. Osborn) thus: 'My son, as I was with Price, Wigglesworth & others, so will I be with thee. They are dead, but now it is time for you to arise, to go & do like-wise. You can cast out devils; YOU heal the sick; YOU raise the dead; YOU cleanse the lepers. Behold I give you power over all the power of the enemy. Be not afraid. Be strong. Be of good courage. I am with thee, as I was with them. No evil power shall be able to stand before THEE all the days of thy life, as you get the people to believe my Word.  I used those men in their day. 
Now I desire to use THEE'...In a single campaign which we conducted, as many as 125 deaf-mutes, 90 totally blind, & 100's of other equally miraculous deliverances have resulted. Happy & joyful conversions have numbered as many as 9,000 in 1 revival."  Box 4231, Tulsa 9, Oklahoma...
"This latent power is FASTING & PRAYER. This is a prayer that is prayed under the influence of fasting. Our spiritual progress will be like supersonic speed...FASTING & PRAYER make it far easier to DELIGHT OURSELVES IN THE LORD, it will give us the light ON THIS POWER. SPACE & TIME TO GOD WILL SHRINK & DISTANCE WILL CEASE TO BE, when one receives the potential light & puts it into practice...
The power of the Spirit is developed to a high degree by many through the use of the most powerful agent known to man, fasting & prayer. Without fasting, prayer becomes ineffectual. Fasting restores & amplifies prayer power.
A 21-40 day prayer & fast will most assuredly hasten the Christian to such a deep & wonderful experience with God that 21 days will equal 21 years. 40 days will equal 40 years...Fasting is the most potent power of the universe, & is placed at the disposal of every believer...The Roman historian, Plutarch, said, 'Instead of using medicine, fast a day'...
'We compare "FASTING AND PRAYING" with the power of the atomic bomb, because, to the Christian, fasting will truly bring atomic spiritual power'...The spiritual atomic power with God, that lies available to every Christian. The scientist can now use and harness the power of the material atom, but the Christian can use and harness the dynamic power of the great Creator of the atom. As the Creator is greater than that which He has created, so is the power wielded by the Christian, through fasting and prayer, greater than that wielded by the atomic scientist...
A complete fast is a fast from the time hunger leaves, until the time hunger returns.
Such a fast may continue from 21-40, depending on the individual, and also on the amount of time it takes you to get your prayers through to Heaven. Fasting & Starvation are also 2 entirely different things.
DRINK WATER WHEN FASTING (over 3 days)...
In about 2 weeks, more or less, the average individual will have most of the wastes, poisons, toxins, fecal materials, etc., eliminated. That is, unless this individual has a deep-seated functional ailment. Even if this be the case, this should be relieved and healed if the fast is continued...
Anyone can fast for long periods of time, but only the Judeo-Christian can expect supernatural results...
Jesus is not criticizing the eating to live. But He is greatly condemning the 'living to eat'...
The lack of fasting explains the great 'falling away,' the 'losing their 1st love,' because man cares more for his 'desire-nature,' than for the fortification of his soul. People have failed to follow the complete pattern of the faith formula of Christ, given in Matthew, chapter 17, or Mark 9:29. They not only failed to have power to do the impossible, but after the days of the apostles the church became powerless, & eventually began to say that the days of healing were over; that the miracles were not for them anymore; the Holy Spirit, after the Bible pattern, was forsaken, & the power of the apostolic age was lost. Many splits soon divided the church of Jesus Christ. The men of old that had fasted & prayed, & who had power with God to perform miracles of healing, had either died, or had been martyred.
The younger generations discontinued the use of fasting...
Many, if not all, the American Indian tribes sought revelation of the Great Spirit through Prayer & Fasting.
When they had famines, food shortages, lack of rain, etc., the Great Spirit was sought through prayer & fasting, & their prayers were answered. In certain tribes nearly all Indian children who came to the age of puberty were set aside in prayer CHILDREN FAST and a fast of 7-10 days, to burn out, so to speak, the evil sex desires, so that they would have high moral thoughts, & live a high spiritual life. As they grew & developed into manhood or womanhood the practice of fasting was continued...
From questionnaires sent to 55,000 children of school age, that 16,000 of them had never heard of the 10 Commandments, let alone quote the Lord’s prayer...
Fasting is beneficial to children. When a child becomes ill, very often several meals, or several days fasting, will fix up everything. Many children as they grow and eat rich foods, develop a pimpled complexion. The source of the condition is in the stomach. The stomach tries to unload its poisonous material in the blood, & to some extent through the skin.
Only a few days of fasting will eradicate all traces of the symptoms...
Babies quite frequently suffer from over-feeding rather than under-feeding...
The 'colic, gases in the stomach, belching, vomiting, diarrhea,’ & many other baby disturbances can be quickly eliminated by a fast of 1 or more meals...Fasting was part & parcel of the very life of Christ. 
Yet this very essential part of Christian life has been ignored by many Christians as if it were an unsolved mystery.
It was never meant to be hidden, and should never have been so overlooked...
Surely such a stupendous truth cannot continue to be a secret hidden in plain sight for over 1,900 years...
Try this truth that gives such a treasure-house of riches and strength.
We do not fast to merit favor from God or as a penance...
Would we not do well to follow our Lord’s example, & avail ourselves of this mighty weapon with which to meet & overcome him 'who goes about as a roaring lion, seeking whom he may devour'...
The great revelation of why He fasted, was shown when He healed this lunatic boy, & answered the question that the disciples had asked Him: "Why could not we cast him out?" Matt. 17:19...
Then the secret of Jesus’ fast was revealed. He showed to them & to us what 'Super-Atomic Power' one can have...'by prayer & fasting.' Matt. 17:20-21...
Our Lord teaches here the big difference between prayer alone, & prayer, combined with fasting...
The disuse of fasting is in direct opposition to the practice, example, & teaching, of Christ...
Christ could not have been tempted by something He did not need. But we read that 'when He had fasted 40 days & 40 nights, He was afterward an hungered.' Now, Jesus could turn these stones into bread and yield to an appetite similar to the one Eve yielded to in the Garden of Eden. The answer that Jesus gave was not only an answer to Satan, but throws a challenge to all humanity: 'Man shall not live by bread alone, but by every word that proceeds out of the mouth of God.' Matt. 4:4.  Jesus received the Holy Spirit, but this did not seem sufficient. It requires fasting and prayer to operate the Holy Ghost.  Jesus, at 30 years of age, only after praying and fasting 40 days & 40 nights, began to manifest Himself as the Son of God with all power, signs, & wonders. There was such an awakening. Fasting is the most powerful means at the disposal of every child of God. Fasting literally becomes prayer to the praying Christian, prayer that is as different as an atomic bomb compared to an ordinary bomb. Prayer alone is like the ordinary bomb, & the fast with prayer, is comparable to the Super-Atomic Bomb...
Usually, the 1st few days of a fast are the most difficult time to pray, because the weakness of the body has not gone, & the body has not been cleansed. Pray as much as possible, as long as possible, and as fervently as possible, regardless of lack of strength, & when you get over 'the hump,' it becomes easier to fast and pray.
Generally speaking, you get stronger physically...
Years ago, a shoe cobbler did this very thing. He was living in Denver, Colorado.
After fasting & praying for 40 days, the power of God became so real & precious, that he gave up his shoe business, started preaching on the street corners, & blessing sick people through the healing ministry of Christ. Hundreds of sick people were prayed for daily, & many miraculously healed. Blind eyes were opened; deaf ears were un-stopped; deaf & dumb spoke; ulcers, cancers, arthritis, & tuberculosis cases, were gloriously healed.
The lame leaped for joy. Wheel chairs, beds, crutches & braces were left ,behind by the ones that were healed in Jesus’ name. All this in answer to the prayers of an individual who caught a revelation through prayer & fasting 40 days...
After several days of the fast have passed, the hunger appetite #2 actually leaves.
If the fast is prolonged, in a few days, possibly a week or 10 days more, the weakness leaves, & the average individual feels even stronger than he did before he began the fast...
The next thing that is noticed, and this is noticeable during the first of the fast, is that appetite, #3, sex desire, leaves. Then, finally, as the one who is fasting proceeds to pray & commune with God, & earnestly seeks the God of Heaven, the greed appetite #4, or the appetite that is the over anxious driving force which causes man to work hard at his job, & worry over his home affairs & his business, be. comes so diminished that it seems insignificant. It usually requires many days of fasting before the greed appetite diminishes. This explains why a long fast is sometimes necessary.
The chief interest now is in seeking God in prayer & fasting. One becomes indifferent to natural things.
It is wonderful when one is glorifying God in his whole body, soul & spirit, with all his members focused toward heaven.
As Sister Mary Sommerville writes, 'It was so wonderful I never wanted to eat again.
The unspeakable glories of heaven were all around me; I felt as if I were sailing all the time.'  So glorious an ecstasy is this marvelous experience, that our every faculty can at last be extended toward heaven for the glory of Jesus Christ.
The precious Holy Spirit may at last have His way with our lives in every way & detail. We hear His voice, as our spirit is attuned to heavenly things...
Fasting will be a heavy, burdensome experience, because Satan does not want you to obtain the great 'FAITH' that is promised to one who fasts.
You will be fighting against spiritual forces of darkness...
Spiritually, one will feel as if the demons of hell are turned against him.
It is doubtful if you will ever have such trials as the strange ones that show up while fasting, or at the close of the fasting period. The trials encountered at this time are numerous; naturally, the Devil will fight to prevent a child of God making headway toward FAITH. It simply means defeat for Satan. Jesus’ greatest testing came after He had fasted 40 days & 40 nights.  Before HE PERFORMED a SINGLE MIRACLE, HE fasted. FASTING & PRAYER DRIVES OUT ALL UNBELIEF & DOUBT...
Starvation begins after most of the body weight is lost. It usually starts after true hunger returns, which is seldom less than 21 days, & may be as long as 40, or even 60 days...
Avicenna, the great Arabian physician, clearly sensed the value of fasting, since he often prescribed as long as a 3-week fast for his patients, especially for syphilis & smallpox.
Dr. Isaac Jennings, as early as 1822, employed fasting successfully as an aid in almost every kind of ailment...
Many incurable diseases in man are caused by demons. Demons cannot be cured.  They must be cast out.
It often requires prayer & fasting to do so...Most folk would be far better off if they would pray & fast at least 1 day a week, they would be stronger physically, & deeper spiritually.
Most of the early churches, especially the Methodists, had at least 1 fast day a week...
I have personally seen pessimism, gloom, discouragement, anger, grudges, fear, morbidity, despondency, worry, fussiness, mental tensions, perversions, vile & depraved thoughts, excitability, other forms of mental conditions, & bad habits disappear completely after the bodily purification is accomplished. Bodily purification leads to spiritual purification.
Demons often feed on food filth & carnality; many times fasting unlooses them & makes a person free from demons & disease...
Your regular diet should not commence, until at least the number of days have elapsed, equal to the number of days that you have fasted. For instance, if you have fasted 28 days, you should have a gradual breaking-in period of 28 days before you resume a regular diet.
You should start out with fruit juices several days, then fresh fruit for 2-3 days more, then light soups, not too milky, for another 2-3 days, & then green vegetables for a further period. Gradually, little by little, break into the regular diet...
Hall, Franklin - God's "atomic power" cited by Allen, Bruce D - http://vidsfitness.com/show/ehmf2KWl734