Is Suicidal Depression a Mental Illness?

"Even if you're not suicidly depressed, even if you're just run of the mill miserable and confused, it's still no joke. It's still no picnic," he says. "You need to know what to do. You need to have a purpose." He adds: "We're unbelievably imitative. That's one of the things that isn't as well known about human beings as it should be known"