Yvon Chouinard

“There is no difference between a pessimist who says, “Oh it’s hopeless, so don’t bother doing anything,” and an optimist who says ‘Don’t bother doing anything, it’s going to turn out fine anyways.’ Either way, nothing happens.”

Here is Chouinards Wikipedia

This raises the following questions. Who is more productive? A pessimist or an optimist. And what is the middle ground between these conflicting behavioural traits? A discussion for another time.

With that said, how you look at life does not matter. One person could be living an identical life to another, although, one is happy and the other is not. So, regardless of how you look at it, glass half full or half empty, you are going to drink the, let's say wine, anyway — and you may as well do it with a smile on your face.