Do not attempt to water Christianity down. There must be no pretence that you can have it with the Supernatural left
out. So far as I can see Christianity is precisely the one religion from which the miraculous cannot be separated. You must frankly argue for supernaturalism from the very outset.
C.S. Lewis, "Christian Apologetics" (1945) included in God in the Dock (Eerdmans, 1970) 99..