I don't think it's so much that god is a possibility, but that epistemologically speaking, it is impossible to rule out with 100% certainty. I label myself an "agnostic atheist" not because I see god's existence as a legitimate, probable scenario, but more because I can't say for certain that a god does not exist.
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell
