Here are some thoughts on Justification from the early church father John Chrysostom, courtesy of the great Reformer Thomas Cranmer and my friend (and fellow heir to the legacy of Chrysostom and Cranmer) David King:
Chrysostom (349-407): What does he mean when he says: “I have declared your justice?” He did not simply say: “I have given,” but “I have declared.” What does this mean? That he has justified our race not by right actions, not by toils, not by barter and exchange, but by grace alone. Paul, too, made this clear when he said: “But now the justice of God has been made manifest independently of the Law.” But the justice of God comes through faith in Jesus Christ and not through any labor and suffering.
Greek text: Τί ποτέ ἐστιν, Εὐηγγελισάμην δικαιοσύνην; Οὐκ εἶπεν ἁπλῶς,
Ἔδωκα, ἀλλ', Εὐηγγελισάμην. Τί δήποτε; Ὅτι οὐκ ἀπὸ κατορθωμάτων, οὐδὲ
πόνων, οὐδὲ ἀμοιβῆς, ἀλλʼ ἀπὸ χάριτος μόνης τὸ γένος ἐδικαίωσε τὸ
ἡμέτερον. Ὅπερ οὖν καὶ ὁ Παῦλος δηλῶν ἔλεγε· Νυνὶ δὲ χωρὶς νόμου
δικαιοσύνη Θεοῦ πεφανέρωται· δικαιοσύνη δὲ Θεοῦ διὰ πίστεως Ἰησοῦ
Χριστοῦ, οὐ διὰ καμάτου τινὸς καὶ πόνου.
Adversus Judaeos, VII, §3, PG 48:919; translation in Fathers of the Church, Vol. 68, Discourses Against Judaizing Christians, Disc. 7.3.2 (Washington, D.C.: The Catholic University of America Press, 1979), pp. 186-187.