Every law framed by man bears the character of a law exactly to that extent to which it is derived from the law of nature.
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

“But for the moment it is the state of nature that concerns us. What Locke has to say about the state of nature and the law of nature is, in the main, not original, but a repetition of medieval scholastic doctrines. Thus Saint Thomas Aquinas says: “Every law framed by man bears the character of a law exactly to that extent to which it is derived from the law of nature. But if on any point it is in conflict with the law of nature, it at once ceases to be a law; it is a mere perversion of law.”* Throughout the Middle Ages, the law of nature was held to condemn “usury,”” source