Through the telling of the miracle of the man at the Pool of Bethesda, John advanced the notion that Jesus is God.
I ran across, in the NIV Application Commentary on John, a quote from C.S. Lewis’ epic work, Mere Christianity. Lewis’ words seem to put in proper perspective the affirmation that Jesus is God:
“I am trying here to prevent anyone saying the really foolish things that people often say about Him: ‘I am ready to accept Jesus as a great moral teacher, but I don’t accept His claim to be God.’ That is the one thing we must not say. A man who was merely a man and said the sort of things Jesus said would not be a great moral teacher. He would either be a lunatic—on a level with the man who says he is a poached egg—or else he would be the Devil of Hell. You must make your choice. Either this man was, and is, the Son of God, or else a madman or something worse. You can shut Him up for a fool, you can spit at Him and kill Him as a demon, or you can fall at His feet and call Him Lord and God. But let us not come with any patronizing nonsense about His being a great human teacher.”
Devotional by Steve Horn. Scripture links by www.biblegateway.com.