Human knowledge and human power meet in one; for where the cause is not known the effect cannot be produced. Nature to be commanded must be obeyed; and that which in contemplation is as the cause is in operation as the rule.
Francis Bacon (1560–1626), British leading political figure, essayist. The Great Instauration, Aphorism 3, p. 272, Essays, Advancement of Learning, New Atlantis, and Other Pieces, ed. Richard Foster Jones, Odyssey Press, New York (1937).