Just before our passage (3:14-21) we meet Nicodemus who came to Jesus by night. That begs the question, why wasn't he willing to come to Jesus by day? And are we? I wish Rembrandt had painted the scene between Nicodemus and Jesus in John chapter 3. He would have had a heyday with the light and darkness in that scene! Maybe Nicodemus came to Jesus by night because he didn't want his deeds exposed to the light. Jesus as the light of the world in John's gospel reveals what a person really is and what are the real values that guide his or her life.
The news that Jesus is the light that has come into the world is good news or bad depending on what you're doing when that light shines in your corner. Alyce M. McKenzie "Edgy Exegesis,"