“The laws of nature, as applied to stones or trees, may only mean ‘what Nature, in fact, does’. But if you turn to the Law of Human Nature, the Law of Decent Behaviour, it is a different matter. That law certainly does not mean ‘what human beings, in fact, do’; for as I said before, many of them do not obey this law at all, and none of them obey it completely.”
Scientific Law and Moral Law
(BBC Broadcast on 8/13/1941; The Reality of the Law in Mere Christianity)