It is a serious thing to live in a society of possible gods and goddesses. —from “The Weight of Glory” When he was president of the Oxford Socratic Club during the 1940s and 50s, C.S. Lewis featured weekly discussions on “repellent doctrines.” By these, he meant traditional Christian teachings that seemed puzzling or implausible—teachings on suffering, miracles, hierarchy, and the like. Lewis thought these doctrines conveyed truths that modern people most needed to know but were...