We tend to think of light and darkness as equal and opposite powers, but of course they’re not. A battle between light and darkness is over in an instant. Wherever light is present, the darkness must give way. Yet darkness has no power to push back in the other direction. Light shines. Darkness doesn’t darken. It can only have a shadowy existence. It is not a positive thing. It is a lack of a positive thing. And when Light shines, darkness is defeated.
So well put. But the whole point of the post is even better.
See it here: Let there be light.