This is the judgment, that the light has come into the world, and men loved the darkness rather than the light; for their works were evil.

 When Nicodemus came to Jesus, he said that no one could help being impressed with the signs and wonders that he did. Jesus' answer was that it was not the signs and the wonders that were really important; the important thing was such a change in a man's inner life that it could only be described as a new birth. 