As the living Father had sent Me, and I live by the Father; so he that eateth Me, even he shall live by me. John 5:57
In life, we try 'eating' many things to bring us pleasure: music, food, entertainment, relationships. Although many of these can be good and wholesome there is only One who can truly satisfy and it is Jesus Christ. When we 'eat' Him something in us becomes whole; satisfied to a depth that none of these things can touch.
We were made in the image of God. There is a spiritual part within us that only God can satisfy. Although music may relax us - it opens the path to the deep places within us - it cannot satisfy that deep place. It is the same with anything we 'eat' in life. It may bring us pleasure but not a lifelong satisfaction.
Psalm 43:4 Then I will go to the altar of God, to God, my joy and my delight. I will praise you with the lyre, O God, my God.
Note, it is at the altar that God becomes the delight of the soul. When a soul is 'delighted' in God then it is truly 'eating Him'. It has found the one thing in life that can bring ultimate satisfaction. All the seeking is finally over and that soul has found 'rest'. It no longer needs to continue in it's soul search for satisfaction in relationships, careers, money or any other thing in life. It has come home.
This is what Christ meant when He said 'he that eateth Me, even he shall live by me.'
Therefore, remember in all the transient pleasures of life, no matter how much you attain and achieve only One will bring you the quiet, deep joy you seek in life.