What's the Point?

I was reading somebody else's blog. He was mentioning depression and said he felt like, "What's the point?"
It sounds awful to tell somebody else what the point is because nobody knows how somebody else feels. But I have considered the "What's the point?" question.
I finally decided that some days I really don't feel like there's much of a point. But the question is, how do I want to be remembered? Well, for my family, friends, former students, I don't want to be remembered as a loser. I want to be thought of in positive ways. So, for me, sometimes that's the point...not for me but for those I care about.