John 6:33 For the bread of God is He who comes down from heaven and gives life to the world.
Christ is here described as the bread of God because He did all things possible to ensure we were given God’s Word for our survival.
Our spiritual lives depend on the word of God, upon our understanding of it, upon the guidance given to us by the Holy Spirit and on our choices we make.
Christ made this all possible for us by giving His life so our choice can be effective and eternal. If He had not paid the price for our sins we would still have to atone for those sins time and time again.