HKB
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Often appears with: the nature and attributes of God · spiritual substances · measure of duration · first movement · fate, destiny, and necessity
Usually: argument (1) · curiosity (1)
“The *one* which is convertible with *being* is opposed to *multitude* by way of privation; as the undivided is to the thing divided.” Thomas, Aquinas, Saint, Summa Theologica, Part I (Prima Pars) · insight
Aquinas concludes that there is only one aeviternity because aeviternity is the simpler measure shared by changeless spiritual substances, analogous to how one first movement grounds unity of time.
as is clear from *Metaph.* x. But the *one* which is convertible with *being* is opposed to *multitude* by way of privation; as the undivided is to the thing divided. Reply Obj. 1: No privation entirely takes away the being of a thing, inasmuch as privation means "negation in the subject," according to the Philosopher (Categor. viii). Nevertheless every privation takes away some being; and so in being, by reason of …