One who believes in the Son has eternal life, but one who disobeys{The same word can be translated "disobeys" or "disbelieves" in this context.} the Son won't see life, but the wrath of God remains on him."

 Nicodemus was a Pharisee, and it is astonishing that a man who regarded goodness in that light and who had given himself to that kind of life in the conviction that he was pleasing God should wish to talk to Jesus at all. 