Religions, of course, have their own demanding intellectual traditions, as Jesuits and Talmudic scholars might attest.... But, in its less rigorous, popular forms, religion is about as intellectually challenging as the average self-help book. (Like personal development literature, mass market books about spirituality and religion celebrate emotionalism and denigrate reason. They elevate the "truths" of myths and parables over empiricism.) In its more authoritarian forms, religion punishes questioning and rewards gullibility. Faith is not a function of stupidity but a frequent cause of it.