The cultural forces pushing against the Christian teaching on conversion are intense. Just consider the claims of naturalism, the affirmation “gay is good,” the call to respect all religions, and contemporary ideas of tolerance. But surely the power of a church’s witness depends on people who have been supernaturally changed. How do we talk about something that both offends and gives hope? Do we call people to . . . convert? How critical is repentance? Can they belong before they believe?