What does John 1:51 mean?
Jesus gives a tiny preview of the miracles in store for the disciples. When speaking to Nathanael, Jesus had mentioned the name Israel, given to a man formerly named Jacob (Genesis 32:28). In Genesis 28:12, Jacob dreamed about angels on a ladder between earth and heaven. Jesus is making a subtle reference to the reason for His ministry: to serve as the connection between men and God.True miracles are always meant to deliver a message from God. The gospel of John records seven miracles chosen specifically to prove that Jesus is God. When Jesus says, "you will see," the Greek word is plural. In other words, "you all will see…" which means His prediction was for all the disciples.
Christ also uses the seventh and most important of the seven names of chapter 1: "the Son of Man." This is one of Jesus' most frequent terms for Himself. It refers to a major prophecy of the Messiah, recorded in Daniel 7:13. Jewish people who heard the phrase, "Son of Man" would know exactly what He was referring to: the Savior and King of Israel.