What Fasting Does in the Life of A Believer?

Fasting humbles the soul before God.

Psalm 35:13

¹³But as for me, when they were sick, my clothing was sackcloth: I humbled my soul with fasting; and my prayer returned into mine own bosom.

It chastens the soul

Psalm 69:10

¹⁰When I wept, and chastened my soul with fasting, that was to my reproach.

It crucifies the appetites and denies them so as to give entire time to prayer

2 Sam 12:16-23/Matt 4: 1-11

¹⁶David therefore besought God for the child; and David fasted, and went in, and lay all night upon the earth.

¹⁷ And the elders of his house arose, and went to him, to raise him up from the earth: but he would not, neither did he eat bread with them.

¹⁸ And it came to pass on the seventh day, that the child died. And the servants of David feared to tell him that the child was dead: for they said, Behold, while the child was yet alive, we spake unto him, and he would not hearken unto our voice: how will he then vex himself, if we tell him that the child is dead?

¹⁹ But when David saw that his servants whispered, David perceived that the child was dead: therefore David said unto his servants, Is the child dead? And they said, He is dead.

²⁰ Then David arose from the earth, and washed, and anointed himself, and changed his apparel, and came into the house of the LORD, and worshipped: then he came to his own house; and when he required, they set bread before him, and he did eat.

²¹ Then said his servants unto him, What thing is this that thou hast done? thou didst fast and weep for the child, while it was alive; but when the child was dead, thou didst rise and eat bread.

²² And he said, While the child was yet alive, I fasted and wept: for I said, Who can tell whether GOD will be gracious to me, that the child may live?

²³ But now he is dead, wherefore should I fast? can I bring him back again? I shall go to him, but he shall not return to me.

¹ Then was Jesus led up of the Spirit into the wilderness to be tempted of the devil.

² And when he had fasted forty days and forty nights, he was afterward an hungred.

³ And when the tempter came to him, he said, If thou be the Son of God, command that these stones be made bread.

⁴ But he answered and said, It is written, Man shall not live by bread alone, but by every word that proceedeth out of the mouth of God.

⁵ Then the devil taketh him up into the holy city, and setteth him on a pinnacle of the temple,

⁶ And saith unto him, If thou be the Son of God, cast thyself down: for it is written, He shall give his angels charge concerning thee: and in their hands they shall bear thee up, lest at any time thou dash thy foot against a stone.

⁷ Jesus said unto him, It is written again, Thou shalt not tempt the Lord thy God.

⁸ Again, the devil taketh him up into an exceeding high mountain, and sheweth him all the kingdoms of the world, and the glory of them;

⁹ And saith unto him, All these things will I give thee, if thou wilt fall down and worship me.

¹⁰ Then saith Jesus unto him, Get thee hence, Satan: for it is written, Thou shalt worship the Lord thy God, and him only shalt thou serve.

¹¹ Then the devil leaveth him, and, behold, angels came and ministered unto him.

It manifest earnestness before God to the exclusion of all else

1 Cor 7:5

⁵Defraud ye not one the other, except it be with consent for a time, that ye may give yourselves to fasting and prayer; and come together again, that Satan tempt you not for your incontinency.

It shows obedience and it gives rest to the digestive system

Matt 6:16-18, 9:15/ Luke 5:33

¹⁶ Moreover when ye fast, be not, as the hypocrites, of a sad countenance: for they disfigure their faces, that they may appear unto men to fast. Verily I say unto you, They have their reward.

¹⁷ But thou, when thou fastest, anoint thine head, and wash thy face;

¹⁸ That thou appear not unto men to fast, but unto thy Father which is in secret: and thy Father, which seeth in secret, shall reward thee openly.

¹⁵And Jesus said unto them, Can the children of the bridechamber mourn, as long as the bridegroom is with them? but the days will come, when the bridegroom shall be taken from them, and then shall they fast.

³³And they said unto him, Why do the disciples of John fast often, and make prayers, and likewise the disciples of the Pharisees; but thine eat and drink?

It demonstrate the mastery of man over appetites

It aides in temptations

It helps to attain power over demons

It develops faith

Fasting crucifies unbelief and aids in prayer

Matthew 17:14-21

¹⁴And when they were come to the multitude, there came to him a certain man, kneeling down to him, and saying,

¹⁵ Lord, have mercy on my son: for he is lunatick, and sore vexed: for ofttimes he falleth into the fire, and oft into the water.

¹⁶ And I brought him to thy disciples, and they could not cure him.

¹⁷ Then Jesus answered and said, O faithless and perverse generation, how long shall I be with you? how long shall I suffer you? bring him hither to me.

¹⁸ And Jesus rebuked the devil; and he departed out of him: and the child was cured from that very hour.

¹⁹ Then came the disciples to Jesus apart, and said, Why could not we cast him out?

²⁰ And Jesus said unto them, Because of your unbelief: for verily I say unto you, If ye have faith as a grain of mustard seed, ye shall say unto this mountain, Remove hence to yonder place; and it shall remove; and nothing shall be impossible unto you.

²¹ Howbeit this kind goeth not out but by prayer and fasting.

Let it be understood that believers ought to fast as led by the Spirit of God. There is no hard and fast rule or regulations or set rules or regulations or set rules given as how long or how often a believer can fast. How long or how often is determined by individual desires and needs. Since fasting and prayers are so prominent in the scripture, modern Christians or our generation of believers should do more of this until they receive power from God over all the powers of the devil.