"Each practical moral virtue has two opposed vices, a "too much" and a "too little" (e.g., cowardice and foolhardiness, or insensitivity and self-indulgence). Theoretical truth also usually contrasts with two opposite errors, e.g., angelism vs. animalism regarding human nature, or deism vs. pantheism in theology, or the denial of free will vs. the denial of predestination. And so too here, with the sacraments. On the one hand, superstition ascribes supernatural powers to the natural things themselves, not as instruments; and on the other hand, in the typically Muslim Ash'arite theology, God does everything Himself and acts not by using natural things as active instruments but only as accidental occasions. Thus the technical term "occasionalism". In Catholic theology, grace is, on the one hand, absolutely sovereign and also, on the other hand, it uses, perfects, and respects nature. Thus divine grace comes to us through the sacraments in a way which perfects their natural matter in giving it the power to actually cause the increase of grace in souls. It" --