Depression is not something that we can all relate to for the same reason, it is a feeling inside of all of us that occurs for a different reason. It can be something that comes and goes, or stays with you like a child clinging onto it's mother. "I know exactly how you feel." No you don't, we are all truly alone in our own minds.
To those who claim depression as folly, try having everything taken away from you, being stripped of all sanity, left alone in a broken void filled only with pain and suffering. Losing any hope of escaping from a never ending nightmare of self-hate. Death becomes a sweet dream in a far away place, while we are forced to live in a world that shoves us deeper into our pit of sorrow. Our insecurites eating us away, dissolving into nothing, like dust in the wind. We fade away slowly, never the same again.