"Certain new theologians dispute original sin, which is the only part of Christian theology which can really be proved."

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Aristotle especially, both by speculation and observation... reached something like the modern idea of a succession of higher organizations from lower, and made the fruitful suggestion of "a perfecting principle" in Nature. With the coming in of Christian theology this tendency toward a yet truer theory of evolution was mainly stopped, but the old crude view remained.

— Andrew Dickson White