Even in a gleefully negative comic there is optimism although it's slightly hidden: It comes out through a comic character's sheer tenacity. He keeps going and trying to find some sort of fulfillment regardless of his perpetual failure record. That's a form of hope a form of optimism. Really hokey I know but it's true.
When you believe in God you've got to believe in the all-powerful God. He's not just God He's the all-powerful God and He has total control over everyone's life. The Devil on the other hand is a real character that's trying his hardest to tear your life apart.