So Hippolytus Adv. Beron. et Hel. Fragm. i. speaks of the Son Incarnate as being “at one and the same time Infinite God and finite Man, having the nature (οὐσίαν) of each in perfection:”  and again, “There has been effected a certain inexpressible and irrefragable union of the two (the Godhead and the Manhood) into one subsistence (ὑπόστασιν).”