The first “I am” statement is recorded in John 6. In the discourse that followed the feeding of the 5,000, Jesus tells the people, “I am the bread of life” (6:35). In the feeding of the 5,000, Jesus supplied people’s physical needs and in his discourse He was showing that He is much more. After the miracle of the feeding, the crowd was asking Jesus to duplicate the miracle of Moses in providing bread (or manna) from heaven. The crowd misunderstood that it wasn’t Moses who gave them manna but it was God; Moses told the people this in Deuteronomy 8:16 (In the wilderness He [God] fed you manna which your fathers did not know, that He might humble you and that He might test you, to do good for you in the end.). There is a difference between the manna that God gave Israel in the wilderness and Jesus; the manna brought nourishment, but failed to give life and Jesus is the bread of everlasting life. Only Jesus can supply what we need.
 Leon Morris, Jesus is the Christ: Studies in the Theology of John. (Grand Rapids, MI: William B. Eerdmans Publishing Co., 1989), 109.
 Elmer Towns, The Gospel of John: Believe and Live. (Chattanooga, TN: AMG Publishers, 2002), 63.