Hell, sometimes *I* don't even understand it and I've been dealing with it my whole life. As a matter of fact, I was in a depressive episode when I first went to see my pdoc and I even told her that I don't have anything to be depressed about. Job is good (stressful, but good), marriage is stable, kiddo doing well with school, and I had a hobby.

So if we can't even understand it sometimes, then it can definitely be a challenge for someone without a mental illness to get it.