One of the recurring difficulties in discussions of justification is not whether repentance is necessary, but how we understand the word itself. In many modern debates, “repent and believe” is either treated as a pure summary of the gospel or quietly redefined as a comprehensive demand for moral renovation prior to acceptance with God. Much of the confusion arises from flattening the New Testament’s varied use of repentance into one fully developed theological construct and then importing that construct into every text indiscriminately.
If repentance always means a fully matured, detailed turning from every sin in thought, word, and deed, then the gospel call can begin to sound like this: “Clean yourself up so that God may accept you.” That subtle shift relocates the ground of acceptance from Christ’s finished work to the sinner’s preparatory obedience. The question, then, is not whether repentance is essential, but how Scripture itself uses the term.
The Confession’s Guardrails
The Reformed tradition was careful here. The Second London Baptist Confession of Faith (1689), in Chapter 15, describes “Repentance unto Life and Salvation” in robust moral terms:
“Such of the elect as are converted at riper years… are, through the ministry of the Word, by the Spirit, made sensible of the manifold evils of their sin… and upon the apprehension of God’s mercy in Christ… so grieve for and hate their sins, as to turn from them all unto God…”
Notice the order. Repentance arises “upon the apprehension of God’s mercy in Christ.” It is not self-cleansing in order to obtain mercy. It is the Spirit-wrought response to mercy revealed. Justification itself, treated in Chapter 11, is “not for anything wrought in them, or done by them.” Faith alone is the instrument.
This distinction is vital. Repentance is necessary and comprehensive in scope. Yet it is never the ground of justification.
The Language of Repent and Relent
The New Testament uses repentance language with flexibility.
The primary verb, metanoeō, signifies a change of mind, a decisive reorientation. It appears in the preaching of John the Baptist and Jesus Christ, and throughout Acts. Another term, metamelomai, can denote regret or remorse. It is used of Judas Iscariot in Matthew 27:3. Judas felt remorse, yet did not experience saving conversion. Not all sorrow is evangelical repentance.
In Revelation, churches are commanded to repent of particular sins. Believers who are already justified are summoned to renewed obedience. The term spans initial conversion and ongoing sanctification. That range cautions us against forcing a single, uniform meaning onto every occurrence.
Context Determines the Turning
When our Lord proclaims:
“The time is fulfilled, and the kingdom of God is at hand; repent and believe in the gospel.”
— Mark 1:15
the immediate issue is the arrival of the King. The call to repent is a summons to reverse one’s verdict about the kingdom and about Christ Himself. It is a turning from unbelief.
Likewise, in Acts 2:
“Repent and be baptized every one of you in the name of Jesus Christ for the forgiveness of your sins…”
— Acts 2:38
Peter addresses men who had rejected and crucified the Messiah. The context defines the content. They must turn from their rejection of Jesus and acknowledge Him as Lord. To import into that moment the fully detailed experience of lifelong mortification risks confusing the immediate object of the command.
True repentance does expand to encompass hatred of all sin. But at the point of conversion, the decisive break is with unbelief, with the false judgment about Christ. From that root, the lifelong fruit of moral repentance grows.
The New Testament’s Greater Severity Toward Legalism
It is also worth observing that while the New Testament warns against both antinomianism and legalism, its sharpest rebukes are directed toward those who corrupt justification by adding works to faith.
Antinomian distortions are addressed. Paul asks in Romans 6, “Shall we continue in sin that grace may abound?” and answers, “By no means.” The Lord Himself warns, “If you love me, you will keep my commandments” (John 14:15). Holiness is not optional.
Yet consider the tone when justification is threatened by legalism. In Galatians, Paul pronounces an anathema on those who preach another gospel. He insists that if circumcision is received as necessary for justification, “Christ will be of no advantage.” In Philippians 3, he calls the Judaizers “dogs” and “mutilators of the flesh.”
Our Lord’s own words reinforce this pattern. He reserved His most severe public denunciations not for tax collectors and prostitutes, but for self-justifying Pharisees. In Matthew 23 He repeatedly declares, “Woe to you, scribes and Pharisees, hypocrites.” In Luke 18, He contrasts the Pharisee who trusted in himself that he was righteous with the tax collector who cried for mercy. The latter went home justified.
Why the severity? Because legalism strikes at the sufficiency of Christ. Antinomianism denies the fruit of grace. Legalism denies its foundation. One distorts sanctification. The other corrupts justification entirely.
This bears directly on our question. If “repent” is interpreted to mean that sinners must sufficiently reform themselves before coming to Christ, we risk placing repentance as a condition of grace where, “grace would no longer be grace” (Romans 11:6). The New Testament’s sharp warnings about adding works to faith should make us guarded. To protect the freeness of the gospel is not to diminish holiness. It is to preserve its proper root.
Historic Disputations: Guarding the Gospel
This distinction was not theoretical. It lay at the heart of major controversies.
In 1517, Martin Luther began his Ninety-Five Theses with the claim:
“When our Lord and Master Jesus Christ said, ‘Repent,’ He willed the entire life of believers to be one of repentance.”
Luther affirmed lifelong repentance. Yet in his conflict with Rome, he rejected the idea that repentance, in the form of sacramental penance and satisfactions, was a meritorious preparation for justification. Repentance flowed from faith. It did not purchase grace.
In early eighteenth-century Scotland, the Marrow Men resisted ministers who implied that sinners must forsake sin in order to qualify for Christ. The Auchterarder Creed expressed the issue (admittedly poorly worded):
“It is not sound and orthodox to teach that we must forsake sin in order to our coming to Christ.”
This was not an endorsement of sin. It was a defense of the gospel’s freeness. Forsaking sin is inseparable from our having been united to Christ, but it is not a precondition that must be met before one may come.
John Owen similarly warned that evangelical obedience must never be “brought into the room of Christ” as the basis of justification. The Protestant tradition repeatedly drew this boundary because the stakes were understood to be that high.
Law, Gospel, and the Direction of Turning
The law commands and exposes. The gospel announces and gives. If repentance is defined as “clean yourself thoroughly so that God may receive you,” then the gospel call collapses back into law. But if repentance is understood as a Spirit-wrought turning from unbelief to Christ, a reorientation inseparable from faith, then it belongs properly within gospel proclamation.
Repentance and faith are not two independent works. They are two aspects of one motion of the soul. One turns from a false refuge. One turns to the true Refuge. One abandons unbelief. One rests in Christ.
The New Testament does not flatten repentance. It uses the term contextually, sometimes emphasizing reversal of judgment about Christ, sometimes particular sins, sometimes ongoing renewal within the church. Throughout, the historic Protestant boundary remains clear. Repentance is necessary, comprehensive, and lifelong. Yet it is never the ground of justification.
In light of the New Testament’s sharper warnings against legalism than antinomianism, we would do well to guard that boundary carefully. To preserve the freeness of grace is not to weaken the call to holiness. It is to ensure that holiness grows from the right soil, the apprehension of God’s mercy in Christ, so that “repent and believe” remains what it was always meant to be. It is not a demand for self-repair before grace. It is the Spirit’s summons to abandon unbelief and rest in the crucified and risen Lord, from whom all true repentance flows.
Particularly Modern 