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the life through which Intellectual-Principle passes is one life but, in its ceaseless changing, a varied life.
Throughout this endless variation it maintains the one course because it is not, itself, subject to change but on the contrary is present as identical and unvarying Being to the rest of things. For if there be no such principle of unchanging identity to things, all is dead, activity and actuality exist nowhere. These “other things” through which it passes are also Intellectual-Principle itself; otherwise it is not the all-comprehending principle: if it is to be itself, it must be all-embracing; failing that, it is not itself. If it is complete in itself, complete because all-embracing, and there is nothing which does not find place in this total, then there can be nothing belonging to it which is not different; only by difference can there be such co-operation towards a total. If it knew no otherness but was pure identity its essential Being would be the less for that failure to fulfil the specific nature which its completion requires.
14.
On the nature of the Intellectual-Principle we get light from its manifestations; they show that it demands such diversity as is compatible with its being a monad. Take what principle you will, that of plant or animal: if this principle were a pure unity and not a specifically varied thing, it could not so serve as principle; its product would be Matter, the principle not having taken all those forms necessary if Matter is to be permeated and utterly transformed. A face is not one mass; there are nose and eyes; and the nose is not a unity but has the differences which make it a nose; as bare unity it would be mere mass.
There is infinity in Intellectual-Principle since, of its very nature, it is a multiple unity, not with the unity of a house but with that of a Reason-Principle, multiple in itself: in the one Intellectual design it includes within itself, as it were in outline, all the outlines, all the patterns. All is within it, all the powers and intellections; the division is not determined by a boundary but goes ever inward; this content is held as the living universe holds the natural forms of the living creatures