Note 585 — Lecture IX. GREEK AND CHRISTIAN THEOLOGY. III. God as the Supreme Being.
Reading edition
E.g. Ath. et Cyr. in Expos. orth. fid., ὑπόστασις = πρόσωπον ὁμοούσιον. In Epictetus, 1. 2. 7, 14, 28, it denotes individuality of character, that which distinguishes one man from another.