Note 114 — Concerning that which is Eternal, for the Purpose of demonstrating the Eternity of the World.
Thomas Taylor translation
By ὕπαρξις, hyparxis, in these Elements is meant that characteristic or summit of any nature, through which it subsists: and in the gods is the same with the unity and deity of their natures. And it is likewise necessary to inform the reader, that by ὑπόϛτασις, hypostasis, or subsistence, is meant any individual nature whether essential, or super-essential, considered as something distinct and different from accident.