Note 572 — Lecture IX. GREEK AND CHRISTIAN THEOLOGY. III. God as the Supreme Being.
Reading edition
It is found, e.g., in Athan. ad Afr. episc. 4, vol. i. 714, ἡ γὰρ ὑπόστασις καὶ ἡ οὐσία ὕπαρξίς ἐστι. The distinction is found in Stoical writers, e.g. Chrysippus says that the present time ὑπάρχει, the past and future ὑφίστανται. Diels, Doxogr. Græci. 462. 1.