MacKenna-Plotinus: Intelectos

But why should it not be simply a dyad? Because neither of the constituents could ever be a pure unity, but at the very least a duality and so progressively [in an endless dualization]. Besides, in that first duality of the hypothesis there would be also movement and rest, Intellect and the life included in Intellect, all-embracing Intellect and life complete. That means that it could not be one Intellect; it must be Intellect agglomerate including all the particular intellects, a thing therefore as multiple as all the Intellects and more so; and the life in it would nat be that of one soul but of all the souls with the further power of producing the single souls: it would be the entire living universe containing much besides man; for if it contained only man, man would be alone here. Enneads   VI,7,8