He was always looking for ways to classify his sadness. But the way I see it the world is a sad place to exist and most of the time the people that live here can push those thoughts to the very back of their mind but sometimes they grow weak and the realization starts to creep back in and fill up your head until it feels like its pouring out of your ears and you're sad and it seems like you don't know why But sad is the normal response to being alive I think. It's all the other emotions we experience that are abnormal.