There cannot be one without the other. Without the cold of the dark we would not know the warmth of the light. Without light we would not be able to see in the dark. Without the dark the light would be unbearably bright. These are complete opposites but they work together so well to help us to survive out in the world. Without opposites like these it wouldn't be long until the world would fall into chaos. We need opposites. Just like we need air to breathe so that we can live.