While this idea may seem outlandish—after all, it seems easy to decide not to believe in God—evidence from several disciplines indicates that what you actually believe is not a decision you make for yourself. Your fundamental beliefs are decided by much deeper levels of consciousness, and some may well be more or less set in stone.We're born that way, say cognitive scientists. We're wired that way from birth. Or perhaps wired from before birth.
Full and interesting article here.
EDIT: Incorrect link repaired @11:24 AM.