This is what I get for taking philosophy while I'm a die-hard atheist.

God, by defenition, is the creator of heavens and earth. He is perfect and requires nothing. HOWEVER, if he created existence, then he required incentive. Incentive implies that he required something. However, by his very nature, he cannot need anything because he is already perfect. By it's very nature, this is a contradiction. The only way God could create the universe was if he had incentive to create it, but having incentive would be contradictory to his nature.

See, this is what happens when you think too much.