Another reminder that we do not live forever, so don't be an asshole (that's how I read it :-)
Don't behave as if you are destined to live forever. What's fated hangs over you. As long as you live, and while you can, become good now.
I need another reminder I am not going to live forever, like I need a whole in my head. BUT, the reminder of mortality is also a reminder to enjoy what we have now. Like this Fall, we went leaf peeping. Life, like Fall, comes and goes quickly. Grab it while you can.