Theodoret of Cyrus: Incarnation to Perfect Human Nature

It was fitting you see, that he for whom all things and through whom all things exist, and who leads many children up to glory, should make perfect the author of our salvation through sufferings (v.10). He presented God the Word making perfect the nature he had assumed. The nature assumed is the source of our salvation: rising from the dead, it procured resurrection for us all. After all, both the one who sanctifies and those sanctified are all from the one source (v.11). He said this in respect of our humanity: the nature assumed is created; our creator and its creator are one, and through it we are sanctified.

- Theodoret of Cyrus (around A.D. 393 to around A.D. 457), Commentary on Hebrews, Chapter 2, in Theodoret of Cyrus, Commentary on the Letters of St. Paul, Volume 2, pp. 146-7 (2001), Robert C. Hill translator.