No one wants to believe in evil, really, above all, not in an evil being, an evil spirit. Everyone wants to abolish the idea. To admit the existence of evil means a responsibility, and no one wants that responsibility. That is the opening through which the evil spirit crawls, stilling all suspicions, making everything seem normal and natural. This is the “thought,” the unwariness of the ordinary human being which amounts to a disinclination to believe in evil. And if you do not believe in evil, how can you believe in or ever know what good is?
-- Pope Benedict XVI
