As long as you live, there may be a chance for something good to happen. If you're not alive, then there's certainly no chance. It comes down to Null's rant about optimism / pessimism and such. I forgot what stream it was from and I don't think I have a clip saved, but it comes down to something like this: if there's no chance for a good outcome, it doesn't matter if you keep trying or give up. But if there's a chance for a good outcome, than the only way to seize it is to keep trying, if you give up you lose by default. So the only reasonable thing to do is keep trying and never completely give up.