No one knows victory like one who has suffered defeat.
No one knows the feelings of being fed like one who has suffered starvation, in any form or fashion.

Remember the woman at the well.  She found out about living water.  She definitely wanted some.  Christ told her she would never thirst again.  Think of it--a commodity that would save her hours every day walking back and forth to the well in Samaria where she had to go to get water for her family. He had a bigger lesson for her to learn about water than transport.

In the JST John 4:6-34, it reads:
And he said unto his disciples, I must needs go through Samaria.

One day we would have this knowledge, but it began with a lesson to a woman in great need and spread throughout the world.

Then he cometh to the city of Samaria, which is called Sychar, near to the parcel of ground which Jacob gave to his son, Joseph; the place where Jacob's well was.

Now Jesus being weary with the journey, it being about the sixth hour, sat down on the well.

And there came a woman of Samaria to draw water; Jesus said unto her, give me to drink.

Now his disciples were gone away into the city to buy meat.

Wherefore, he being alone, the woman of Samaria said unto him, How is it that thou being a Jew asketh drink of me, who am a woman of Samaria?  The Jews have no dealings with the Samaritans.

Jesus answered and said unto her, If thou knewest the gift of God, and who it is that saith to thee, Give me to drink; thou wouldest have asked of him, and he would have given thee living water.

The woman saith unto him, Sir, thou hast nothing to draw with, and the well is deep: from whence then hast thou that living water? (Logical question and great observation)

Art thou greater than our father Jacob, who gave us the well, and drank thereof himself, and his children, and his cattle?

Jesus answered and said unto her, Whosoever shall drink of this well shall thirst again:

But whosoever drinketh of the water which I shall give him shall never thirst; but the water that I shall give him shall be in him a well of water springing up into everlasting life.

The woman said unto him, Sir, give me of this water, that I thirst not, neither come hither to draw.

Jesus saith unto her, Go, call thy husband, and come hither.

The woman answered and said, I have no husband. Jesus said unto her, Thou hast well said, I have no husband:

For thou hast had five husbands; and he whom thou now hast is not thy husband: in that saidst thou truly.

The woman saith unto him, Sir, I perceive that thou art a prophet.

Our fathers worshipped in this mountain; and ye say, that in Jerusalem is the place where men ought to worship.

Jesus saith unto her, Woman, believe me, the hour cometh, when ye shall neither in this mountain, nor yet at Jerusalem, worship the Father.

Ye worship ye know not what: we know what we worship: and salvation is of the Jews.

And the hour cometh, and now is, when the true worshippers shall worship the Father in spirit and in truth: for the Father seeketh such to worship him.

For unto such hath God promised his Spirit: and they who worship him must worship in spirit and in truth.

The woman sad unto him, I know that Messias cometh, who is called Christ: when he is come, he will tell us all things.

Jesus said unto her, I who speak unto thee am the Messias.

And upon this came his disciples, and marvelled that he talked with the woman: yet no man said, What seekest thou? or, Why talkest thou with her?

The woman then left her waterpot, and went her way into the city, and saith to the men,

Come, see a man, who told me all things that I have ever done: is not this the Christ?

Then they went out of the city, and came unto him.

In the meantime while his disciples prayed him, saying, Master, eat.

But he said unto them, I have meat to eat that ye know not of.

Therefore said the disciples one to another, Hath any man brought him ought to eat?

Jesus sad unto them, My meat is to do the will of him who sent me, and to finish his work.

There are quite a number of feasting/fasting lessons here that I saw.
Isn't it interesting that the Savior, being the bread of life and the living water, is constantly teaching these men where their real meal is, and for some reason this knowledge is constantly going over their heads.  Off to the market they go to find meat to buy, when they could sit at the feet of the Bread of Life and drink of Living water and be filled, and they will not.  Are we so different than they?

The woman catches on rapidly that tradition, Jacob's well, supposedly the source of living water, is symbolic.  It is Christ himself that is offering the greatest drink this woman has ever drunk.

The better meal that is there for all of us is the will of God.  It is Christ who told his disciples that his meat is to the do the will of him who sent even Jesus Christ.  Doing his will filled him up, so evidently when we get the word of God to each of us, for God will give his precious word to each and every one of us, and it will fill us each individually, we will be fed.

Will doing the will of God, recognizing the author and finisher of our faith, be sufficient to fill our spiritual bellies and give us the satisfaction that earthly food will never offer?  Is this one of the larger reasons we are encouraged to fast? so we can tell the difference between man's will and God's? Man's idea of food and the real meal? Will this actually allow us to be found in a different space where the real feast is?

Can someone know this who has not tasted it?  Good question for someone who decides to put the fast to the test.