The Divine Invasion, by Philip K. Dick at American Buddha Online Library
"'The Ape of God,'" Elias said. "A Medieval theory about the Devil. That he apes God's legitimate creation with spurious interpolations of his own. That's really an exceedingly sophisticated idea, epistemologically speaking. Does it mean that parts of the world are spurious? Or that sometimes the whole world is spurious ? Or that there are plural worlds of which one is real and the others are not? Is there essentially one matrix world from which people derive differing perceptions? So that the world you see is not the world I see?"