This universe is shot through with mystery. The very fact of its being, and of our own, is a mystery absolute, and the only miracle worthy of the name. The consciousness that animates us is itself central to this mystery and the ground for any experience we might wish to call 'spiritual.' No myths need be embraced for us to commune with the profundity of our circumstance. No personal God need be worshiped for us to live in awe at the beauty and immensity of creation. No tribal fictions need be rehearsed for us to realize, one fine day, that we do, in fact, love our neighbors, that our happiness is inextricable from their own, and that our interdependence demands that people everywhere be given the opportunity to flourish.
As many critics of religion have pointed out, the notion of a creator poses an immediate problem of an infinite regress. If God created the universe, what created God? To say that God, by definition, is uncreated simply begs the question. Any being capable of creating a complex world promises to be very complex himself. As the biologist Richard Dawkins has observed repeatedly, the only natural process we know of that could produce a being capable of designing things is evolution.