Ludwig von Mises Quotes
There are for man only two principles available for a mental grasp of reality, namely, those of teleology and causality. What cannot be brought under either of these categories is absolutely hidden to the human mind. An event not open to an interpretation by one of these two principles is for man inconceivable and mysterious. Change can be conceived as the outcome either of the operation of mechanistic causality or of purposeful behavior; for the human mind there is no third way available.
von Mises, Ludwig. Human Action: A Treatise on Economics. Yale University Press, 1949.
Ludwig Heinrich Edler von Mises was an Austrian School economist, historian, logician and sociologist. Mises wrote and lectured extensively on the societal contributions of classical liberalism. He is best known for his work on praxeology, a study of human choice and action.