“Could there really be any such thing as horrifying wickedness [if there were no God and we just evolved]? I don’t see how. There can be such a thing only if there is a way that rational creatures are supposed to live, obliged to live. . . . A [secular] way of looking at the world has no place for genuine moral obligation of any sort . . . and thus no way to say there is such a thing as genuine and appalling wickedness. Accordingly, if you think there really is such a thing as horrifying wickedness (. . . and not just an illusion of some sort), then you have a powerful . . . argument [for the reality of God].”
~ Alvin Plantinga, quoted by Timothy Keller in The Reason for God (New York, NY: Dutton, 2008), 26.