[O]nly serious ignorance of Jewish and Pagan culture would lead anyone to the conclusion that it is a radically new thing. Essentially, Christianity is not the promulgation of a moral discovery. It is addressed only to penitents, only to those who admit their disobedience to the known moral law.
--C. S. Lewis, 'On Ethics,' in Christian Reflections (Eerdmans 1967), 46-47
HT: Jack Collins, Covenant Seminary