I've been told that light is good and evil is darkness. If this true then I discovered something. Imagine you are in a room filled with light. Look at the floor and you'll see your shadow. Your being in the light has introduced darkness, a mar on the light's perfection.
Now turn the light off. It's dark isn't it? But note how you can no longer see your shadow. It seems that evil remains unchanged by the presence of something, where the good is automatically changed.
What does this mean? I don't know, but it keeps me up at night.