Christians sometimes assume that the language of justification by faith alone (sola fide) became clear during the Reformation. But long before Luther, we find early Christian writers speaking in strikingly Pauline terms about salvation as God’s gift, received by faith, not earned by works.
To be sure, later generations coined concise slogans and technical vocabulary to defend the truth more precisely. The early church writers did not use those later labels. But the underlying doctrine is the same: again and again, they deny justification by our own works and point to God’s saving initiative in Christ, received through faith.
Below are several verbatim quotations from early Christian sources (with primary citations), followed by two careful, expanded summaries (not verbatim quotations) from later patristic commentators often cited in discussions of justification.
Clement of Rome (c. AD 96–100)
“And we, too, being called by His will in Christ Jesus, are not justified by ourselves, nor by our own wisdom, or understanding, or godliness, or works which we have wrought in holiness of heart; but by that faith through which, from the beginning, Almighty God has justified all men; to whom be glory for ever and ever. Amen.”
Source: 1 Clement 32:4 (Roberts and Donaldson translation). (ccel.org)
Polycarp (c. AD 69–155/160)
“Though ye saw Him not, ye believe with joy unutterable and full of glory; unto which joy many desire to enter in; forasmuch as ye know that it is by grace ye are saved, not of works, but by the will of God through Jesus Christ.”
Source: Polycarp, To the Philippians 1.3 (Lightfoot translation as reproduced online. Wording varies slightly across editions). (earlychristianwritings.com)
Epistle to Diognetus (anonymous early Christian writing, 2nd century, chapter 9)
“He gave His own Son as a ransom for us, the holy One for transgressors, the blameless One for the wicked, the righteous One for the unrighteous, the incorruptible One for the corruptible, the immortal One for them that are mortal. For what other thing was capable of covering our sins than His righteousness? By what other one was it possible that we, the wicked and ungodly, could be justified, than by the only Son of God? O sweet exchange! O unsearchable operation! O benefits surpassing all expectation! That the wickedness of many should be hid in a single righteous One, and that the righteousness of One should justify many transgressors!”
Source: Epistle to Diognetus 9. (newadvent.org)
Irenaeus of Lyons (c. AD 130–202)
“For faith towards God justifies a man…”
Source: Irenaeus, Against Heresies, Book 4 (section numbering can vary by edition; see the phrase in the linked online text). (newadvent.org)
Two Expanded Summaries (Not Verbatim Quotations)
The two entries below are not presented as word-for-word quotations. They are expanded summaries of the theological emphasis in context, commonly discussed in patristic studies and traced in the secondary source cited at the end.
Origen (c. AD 185–254)
Origen, commenting on Paul (especially Romans), argues that a sinner’s acceptance with God is grounded in God’s saving action in Christ and is received through faith, not achieved by works, whether moral achievement or the works of the law. He treats justification as something God grants to the one who believes, and he appeals to the thief on the cross as a vivid illustration: a man with no time to present a catalog of deeds is nevertheless received by Christ through faith. Origen also presses the justice of God, insisting that God does not simply wave away guilt, but provides a mediator who deals with sin so that God can justify sinners without compromising His righteousness.
Marius Victorinus (c. AD 290–364)
Marius Victorinus, writing as an early Latin commentator on Paul, emphasizes that righteousness and salvation do not arise from law-keeping as the ground of acceptance, but are given by God through faith in Christ. In his handling of texts like Ephesians 2, he underscores Paul’s purpose of shutting the door on boasting: salvation is God’s gift, not a human achievement. Victorinus presents faith as the means by which believers receive what God provides in Christ, and he treats good works as the fitting fruit of grace rather than the basis of justification.
Secondary Source (for the two summaries above)
Nathan Busenitz and John MacArthur, Long before Luther: Tracing the Heart of the Gospel from Christ to the Reformation (Chicago: Moody Publishers, 2017), 169–171.