Light signifies goodness. It literally brightens up our world, and goodness brightens the countenance of our souls. In Christ, the supernatural power of light compels us to goodness, as well. Jesus never sinned! God the Father defeated the power of darkness and death through God the Son, Jesus, when He raised Him from the dead after the crucifixion. God is a God of second chances and gives grace to those who believe and walk with Him.
It reads in Luke 11:33-36 Easy English Bible>
Then Jesus said, ‘When someone lights a lamp, he does not hide it. Nor does he put it under a pot. Instead, he puts it in a high place. Then other people who come into the room can see the light from the lamp. Your eyes are like lamps and your body is like a room. Be careful that your eyes are like a clean lamp, then your whole body will have light. But if your eyes are dirty, your whole body will be completely in the dark. So you must be careful. Be sure that you really have light in you. Be sure that you are not still in the dark. Your whole body needs to have lots of light. Nothing dark should be there. It will be as if a lamp is shining its bright light on you.’