"No deeply rooted tendency was ever extirpated by adverse judgment. Not having originally been founded on argument, it cannot be destroyed by logic."

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Reason's biological function is to preserve and promote life and to postpone its extinction as long as possible. Thinking and acting are not contrary to nature; they are, rather, the foremost features of man's nature. The most appropriate description of man as differentiated from nonhuman beings is: a being purposively struggling against the forces adverse to his life.

— Ludwig von Mises