Light has a way of making itself known, of drawing attention to itself. It doesn't usually need to be announced- "Look, the light is on!" John is intent on telling us new things about Jesus, on forcing us to see and accept him for who he really is. Along the way John also describes us, introducing us to us and revealing some things that we might rather ignore or overlook or treat with kid gloves. Here we discover Jesus as the Light of Life, the Life of God, and the fact that none of us can see him as light if left to ourselves. We see our darkness and need for sight and life and faith and find Jesus to be the Light that is worth praising and proclaiming.