“It doesn’t matter that Cathy was what I would have called a monster. Perhaps we can’t understand Cathy, but on the other hand we are capable of many things in all directions, of great virtues and great sins. And who in his mind has not probed the black water? Maybe we all have in us a secret pond where evil and ugly things germinate and grow strong. But this culture is fenced, and the swimming brood climbs up only to fall back. Might it not be that in the dark pools of some men the evil grows strong enough to wriggle over the fence and swim free? Would not such a man be our monster, and are we not related to him in our own hidden water? It would be absurd if we did not understand both angels and devils, since we invented them.”