I've come to the conclusion that depression is more than a disease of the mind. It is a crisis of identity.
Those who are depressive will probably know what I mean by this. I've come to realize that I see myself through depression, as depression, my identity is depression. That's all I know. That's why treatment doesn't really work, because you can't let go of depression when it's how you see yourself and it's all that's holding you together.