Mark 14:22 And as they did eat, Jesus took bread, and blessed, and brake it, and gave to them, and said, Take, eat: this is my body.
Jesus told us that He is the bread of life and that bread is without sin (unleavened) -
John 6:35 And Jesus said unto them, I am the bread of life: he that cometh to me shall never hunger; and he that believeth on me shall never thirst.
Heb 9:28 So Christ was once offered to bear the sins of many; and unto them that look for him shall he appear the second time without sin unto salvation.
We also are told that man shall not live (physically) by bread alone but (spiritually) by every word that proceeds out of the mouth of God -
Matt 4:4 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.
And that He is the Word -
John 1:1 In the beginning was the Word, and the Word was with God, and the Word was God.
So then it follows that if we are to continue feeding on the unleavened bread of sincerity and truth (1Cor 5:8), we must feed on the word of God daily.
Father, give us this day our daily bread. (Matt 6:11)