The Six Books of Proclus on the Theology of Plato, Volume 2

All things which among principal causes possess a more total and higher order in their effects, according to the illuminations proceeding from them, become in a certain respect subjects to the communications of more partial causes. And the illuminations indeed, from higher causes, receive the progressions from secondary causes; but the latter are established in the former. And thus some participations precede others, and some representations extend after others, beginning from on high, to the same subject, more total causes having a prior energy, but such as are more partial, supplying their participants with their communications, posterior to the energies of more total causes.

For if more causal natures energize prior to such as are secondary on account of exuberance of power, and are present with those that have a more imperfect aptitude, and illuminate them also; but things more subordinate, and which are second in order, are supplied from such as are more causal,—it is evident that the illuminations of superior natures antecedently comprehend that which participates of both these, and give stability to the communications of things subordinate. But these illuminations of superior causes, employ the resemblances of subordinate natures as foundations, and operate on that which participates of them, the superior causes themselves having a prior energy.