C.S. Lewis on Cafeteria Christianity
Mere Christianity (New York: Simon and Schuster, 1996 [first published 1943]), p.81
You will find this again and again about anything that is really Christian: every one is attracted by bits of it and wants to pick out those bits and leave the rest. That is why we do not get much further: and that is why people who are fighting for quite opposite things can both say they are fighting for Christianity.