This is the reason the Evangelist has record these events for us. He invites you to hear a man who has been sent from God to reveal to you the messiah. His testimony is that the long awaited Messiah is Jesus.
The gospel tells us that we are made at the hands of Jesus, and that He can and will recreate us to make us new. It tells us the He has a purpose for our lives that will bring us unspeakable joy and peace. It tells us that our purpose is to love Jesus by following his command of laying down our lives for each other, and it fully asserts
If Jesus is not the eternal, divine creator of the world He can not recreate you into his likeness. If Jesus was not the true light, then we will all continue to stumble in the darkness. If Jesus was not greater than Moses then we all are condemned. If Jesus did not truly come in the flesh, as a man, then our sins are not forgiven. We must have this Jesus that John describes to us, or we are lost!