2. And then, again, with reference to the entire Pleroma, what reason is there that it should be divided into these three—an Ogdoad, a Decad, and a Duodecad—and not into some other number different from these? Moreover, with respect to the division itself, why has it been made into three parts, and not into four, or five, or six, or into some other number among those which have no connection with such numbers as belong to creation? For they describe those [Æons above] as being more ancient than these [created things below], and it behoves them to possess their principle [of being] in themselves, one which existed before creation, and not after the pattern of creation, all exactly agreeing as to the point.