that which has less of being,—this is to begin to have an evil will. Now, to seek to discover the causes of these defections,—causes, as I have said, not efficient, but deficient,—is as if some one sought to see darkness, or hear silence. Yet both of these are known by us, and the former by means only of the eye, the latter only by the ear; but not by their positive actuality,488 but by their want of it. Let no one, then, seek to know from me what I know that I do not know; unless he perhaps wishes to learn to be ignorant of that of which all we know is, that it cannot be known. For those things which are known not by their actuality, but by their want of it, are known, if our expression may be allowed and understood, by not knowing them, that by knowing them they may be not known. For when the eyesight surveys objects that strike the sense, it nowhere sees darkness but where it begins not to see. And so no other sense but the ear can perceive silence, and yet it is only perceived by not hearing. Thus, too, our mind perceives intelligible forms by understanding them; but when they are deficient, it knows them by not knowing them; for "who can understand defects?"489
- Of the misdirected love whereby the will fell away from the immutable to the mutable good.
This I do know, that the nature of God can never, nowhere, nowise be defective, and that natures made of nothing can. These latter, however, the more being they have, and the more good they do (for then they do something positive), the more they have efficient causes; but in so far as they are defective in being, and consequently do evil (for then what is their work but vanity?), they have deficient causes. And I know likewise, that the will could not become evil, were it unwilling to become so; and therefore its failings are justly punished, being not necessary, but voluntary. For its defections are not to evil things, but are themselves evil; that is to say, are not towards things that are naturally and in themselves evil, but the defection of the will is evil, because it is contrary to the order of nature, and an abandonment of that which has supreme being for that