3. According to our view, there is no rational creature which is not capable both of good and evil. But it does not follow, that because we say there is no nature which may not admit evil, we therefore maintain that every nature has admitted evil, _i.e._ has become wicked. As we may say that the nature of every man admits of his being a sailor, but it does not follow from that, that every man will become so; or, again, it is possible for every one to learn grammar or medicine, but it is not therefore proved that every man is either a physician or a grammarian; so, if we say that there is no nature which may not admit evil, it is not necessarily indicated that it has done so. For, in our view, not even the devil himself was incapable of good; but although capable of admitting good, he did not therefore also desire it, or make any effort after virtue. For, as we are taught by those quotations which we adduced from the prophets, there was once a time when he was good, when he walked in the paradise of God between the cherubim. As he, then, possessed the power either of receiving good or evil, but fell away from a virtuous course, and turned to evil with all the powers of his mind, so also other creatures, as having a capacity for either condition, in the exercise of the freedom of their will, flee from evil, and cleave to good. There is no nature, then, which may not admit of good or evil, except the nature of God—the fountain of all good things—and of Christ; for it is wisdom, and wisdom assuredly cannot admit folly; and it is righteousness, and righteousness will never certainly admit of unrighteousness; and it is the Word, or Reason, which certainly cannot be made irrational; nay, it is also the light, and it is certain that the darkness does not receive the light. In like manner, also, the nature of the Holy Spirit, being holy, does not admit of pollution; for it is holy by nature, or essential being. If there is any other nature which is holy, it possesses this property of being made holy by the reception or inspiration of the Holy Spirit, not having it by nature, but as an accidental quality, for which reason it may be lost, in consequence of being accidental. So also a man may possess an accidental righteousness, from which it is possible for him to fall away. Even the wisdom which a man has is still accidental, although it be within our own power to become wise, if we devote ourselves to wisdom with the zeal and effort of our life; and if we always pursue the study of it, we may always be participators of wisdom: and that result will follow either in a greater or less degree, according to the desert of our life or the amount of our zeal. For the goodness of God, as is worthy of Him, incites and attracts all to that blissful end, where all pain, and sadness, and sorrow fall away and disappear.