The Cause of things good is One. If the Evil is contrary to the Good, the many causes of the Evil, certainly those productive of things evil, are not principles and powers, but want of power, and want of strength, and a mixing of things dissimilar without proportion. Neither are things evil unmoved, and always in the same condition, but endless and undefined, and borne along in different things, and those endless. The Good will be beginning and end of all, even things evil, for, for the sake of the Good, are all things, both those that are good, and those that are contrary. For we do even these as desiring the Good (for no one does what he does with a view to the Evil), wherefore the Evil has not a subsistence, but a parasitical subsistence, coming into being for the sake of the Good, and not of itself.

- Saint Dionysus the Aeropagite “The Divine Names” (Chapter 4; section 31)