Is not this the fast that I have chosen? to loose the bands of wickedness, to undo the heavy burdens, and to let the oppressed go free, and that ye break every yoke? Is it not to deal thy bread to the hungry, and that thou bring the poor that are cast out to thy house? when thou seest the naked, that thou cover him; and that thou hide not thyself from thine own flesh? Then shall thy light break forth as the morning, and thine health shall spring forth speedily: and thy righteousness shall go before thee; the glory of the Lord shall be thy rereward.
Blessed are they which do hunger and thirst after righteousness: for they shall be filled.
The point of a fast is to force your flesh to be in subjection to your spirit.
Fasting is like a frequency. God is always broadcasting. Fasting helps us better tune into Him.
Take heed that ye do not your alms before men, to be seen of them: otherwise ye have no reward of your Father which is in heaven. Therefore when thou doest thine alms, do not sound a trumpet before thee, as the hypocrites do in the synagogues and in the streets, that they may have glory of men. Verily I say unto you, They have their reward. But when thou doest alms, let not thy left hand know what thy right hand doeth: That thine alms may be in secret: and thy Father which seeth in secret himself shall reward thee openly. And when thou prayest, thou shalt not be as the hypocrites are : for they love to pray standing in the synagogues and in the corners of the streets, that they may be seen of men. Verily I say unto you, They have their reward. But thou, when thou prayest, enter into thy closet, and when thou hast shut thy door, pray to thy Father which is in secret; and thy Father which seeth in secret shall reward thee openly. 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. But thou, when thou fastest, anoint thine head, and wash thy face; 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.
Jesus establishes 3 things that we should do:
And if one prevail against him, two shall withstand him; and a threefold cord is not quickly broken.
Hearken; Behold, there went out a sower to sow: And it came to pass, as he sowed, some fell by the way side, and the fowls of the air came and devoured it up. And some fell on stony ground, where it had not much earth; and immediately it sprang up, because it had no depth of earth: But when the sun was up, it was scorched; and because it had no root, it withered away. And some fell among thorns, and the thorns grew up, and choked it, and it yielded no fruit. And other fell on good ground, and did yield fruit that sprang up and increased; and brought forth, some thirty, and some sixty, and some an hundred.
 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.  Howbeit this kind goeth not out but by prayer and fasting.
The enemy knows the power your stomach holds over you and uses it to put your flesh before your spirit.
And when the woman saw that the tree was good for food, and that it was pleasant to the eyes, and a tree to be desired to make one wise, she took of the fruit thereof, and did eat, and gave also unto her husband with her; and he did eat.
From the beginning, the enemy used food to tempt man towards the flesh.
Behold, this was the iniquity of thy sister Sodom, pride, fulness of bread, and abundance of idleness was in her and in her daughters, neither did she strengthen the hand of the poor and needy. And they were haughty, and committed abomination before me: therefore I took them away as I saw good .
Esau and Jacob…
And the mixt multitude that was among them fell a lusting: and the children of Israel also wept again, and said, Who shall give us flesh to eat? We remember the fish, which we did eat in Egypt freely; the cucumbers, and the melons, and the leeks, and the onions, and the garlick: But now our soul is dried away: there is nothing at all, beside this manna, before our eyes. And say thou unto the people, Sanctify yourselves against to morrow, and ye shall eat flesh: for ye have wept in the ears of the Lord , saying, Who shall give us flesh to eat? for it was well with us in Egypt: therefore the Lord will give you flesh, and ye shall eat. Ye shall not eat one day, nor two days, nor five days, neither ten days, nor twenty days; But even a whole month, until it come out at your nostrils, and it be loathsome unto you: because that ye have despised the Lord which is among you, and have wept before him, saying, Why came we forth out of Egypt?
And while the flesh was yet between their teeth, ere it was chewed, the wrath of the Lord was kindled against the people, and the Lord smote the people with a very great plague. And he called the name of that place Kibroth-hattaavah: because there they buried the people that lusted.
You can gain victory over your stomach by developing a pattern of fasting.
Examples of fasting in the Word:
2 Saual 1:12 – Sarah
Acts 9 – Paul
Acts 10 – Peter
2 Con 20:17
3 primary fast
Absolute Fast – no food or water (not for extended periods of time)
Normal Fast – no food, but broths, water etc…
Partial Fast – Give up particular food and beverages or meals
When fasting, you have to make a point to dig into the world. If you don’t replace food with spiritual things it is not a fast. It is just a diet.
Blow the trumpet in Zion, sanctify a fast, call a solemn assembly: And it shall come to pass afterward, that I will pour out my spirit upon all flesh; and your sons and your daughters shall prophesy, your old men shall dream dreams, your young men shall see visions:
I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service.
When you engage in giving, praying and fasting, you are presenting your life as a living sacrifice. Doing these things together will cause you to gain immense spiritual insight and a new intimacy with God.