For myself, I do not choose to be depressed, nor do I think depression is the same for everyone. If positive thinking was a cure, why is anyone depressed? OH Wait, I know...they choose to be! Seriously?
If something like that works for you, Creative1onder, that's great, but please don't cram it down my throat. I'm not going to "justify" the depression. It is a fact, for me and has been for most of my life.