There is no evidence of even a possibility that a god/gods exist. Gods are only created from the human mind. To paraphrase Cris, they're figments of human imagination. Believing in god(s) is akin to believing that the great big hairy monstery under your bed (perhaps you made his acquaintence around the age of five?) is real.
Why believe? There is no logical reason.
Why believe? There is no logical reason.