Theodoret of Cyrus: Sola Gratia

But God, who is rich in mercy, out of his great love with which he loved us made us alive with Christ even when we were dead through our falls (v.4): but though our condition was so bad, the Lord God in the depths of his goodness made us sharers in the immortal life of our Lord - the meaning of made us alive with Christ: since he is rise, we also hope to rise, as through him our condition has been set to rights. Then he brings out more clearly the greatness of the gift, by grace you are saved: you were called not on account of the excellence of your life but on account of the love of the one who saved you.

- Theodoret of Cyrus (around A.D. 393 to around A.D. 457), Commentary on the Letter to the Ephesians, Chapter 2, in Theodoret of Cyrus, Commentary on the Letters of St. Paul, Volume 2, p. 39 (2001), Robert C. Hill translator.