Does unity therefore inhere in essences, and does it subsist with
them? If it inhere in essences, or if it be an accident, as health is
an accident of man, it must be something individual (like health). If
unity be an element of the composite, it will first have to exist
(individually), and be an unity in itself, so as to be able to unify
itself to something else; then, being blended with this other thing
that it has unified, it will not longer remain really one, and will
thereby even become double. Besides, how would that apply to the decad?
What need of the (intelligible) Decad has that which is already a
decad, by virtue of the power it possesses? Will it receive its form
from that Decad? If it be its matter, if it be ten and decad only
because of the presence of the Decad, the Decad will have first to
exist in itself, in the pure and simple state of (being a) Decad.