The moral difficulty is that Dualism gives evil a positive, substantive, self-consistent nature, like that of good. If this were true, if Ahriman existed in his own right no less than Ormuzd, what could we mean by calling Ormuzd good except that we happened to prefer him. In what sense can the one party be said to be right and the other wrong? If evil has the same kind of reality as good, the same autonomy and completeness, our allegiance to good becomes the arbitrarily chosen loyalty of a partisan.
