How do you deal with dark periods of your life?

Maybe this is too semantic of me, but i find the darkness more comfortable to be in, so that i see with more clarity what does have light in it, the world, life itself is naturally dark. When one is enjoying for example friends in good times, this is what could probably be called false, not real, so when you get let down, see it as being told the truth for a change, and be thankful for that.