"A belief which leaves no place for doubt is not a belief; it is a superstition."

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History does not record anywhere at any time a religion that has any rational basis. Religion is a crutch for people not strong enough to stand up to the unknown without help. But, like dandruff, most people do have a religion and spend time and money on it and seem to derive considerable pleasure from fiddling with it.

— Robert A. Heinlein