But if the Creator is truly loved, that is, if He Himself is loved and not another thing in His stead, He cannot be evilly loved; for love itself is to be ordinately loved, because we do well to love that which, when we love it, makes us live well and virtuously. So that it seems to me that it is a brief but true definition of virtue to say, it is the order of love; and on this account, in the Canticles, the bride of Christ, the city of God, sings, "Order love within me." It was the order of this love, then, this charity or attachment, which the sons of God disturbed when they forsook God, and were enamoured of the daughters of men. And by these two names (sons of God and daughters of men) the two cities are sufficiently distinguished. For though the former were by nature children of men, they had come into possession of another name by grace. For in the same Scripture in which the sons of God are said to have loved the daughters of men, they are also called angels of God; whence many suppose that they were not men but angels.