We Establish the Law: How Faith Upholds God's Command
Short answer: Romans 3:27-31 teaches that salvation by faith excludes all human boasting, yet it does not cancel God's law. Paul asks, Where then is the boasting? It is excluded. He then insists that faith upholds the law rather than nullifying it. The law cannot justify a sinner, because the flesh is weak, but it still reveals God's holy standard. Christ fulfilled it perfectly and bore its curse for his people. So the law is not abolished for believers; it is established on the only foundation that can hold it up, namely the finished work of Christ received by faith. The law no longer condemns those in Christ, but it still guides, exposes sin, and drives us back to the Savior. Faith and law are not rivals when rightly understood.
What exactly is Paul asking in Romans 3:27
Romans 3:27-31 arrives at the climax of Paul's argument. He has already shown that Jew and Gentile alike are under sin, that no one is righteous by works of law, and that justification comes through faith in Jesus Christ apart from works. Then he asks where boasting has gone. The question is not abstract. In Paul's world, Israel had the law, the covenants, the promises, and circumcision. Those were real privileges. The danger was turning privileges into grounds for pride, as though being Jewish or keeping certain rituals put God in one's debt. The same danger lives in every religious heart today.
Paul's answer is blunt. Boasting is excluded, but not by a law of works. It is excluded by a law of faith. Notice his wording carefully. He is not setting one law against another in a flat contradiction, as though God changed his mind. He is using law in the sense of a governing principle. The principle of works says I contribute, therefore I can boast. The principle of faith says God provides everything, therefore I receive with empty hands. One principle leaves room for self-congratulation. The other shuts the door completely. Whichever principle governs your standing before God determines whether boasting survives.
This matters because human beings are incurably prone to comparison. We measure ourselves against worse neighbors and conclude we are acceptable. We measure ourselves against better neighbors and either despair or strive harder. Both responses are forms of boasting, because both keep the focus on us. The gospel ends that treadmill. If righteousness is received by faith, then the most moral churchgoer and the most notorious sinner stand on exactly the same footing. Neither can claim credit. That is humiliating to the proud and liberating to the broken, which is precisely why the doctrine of justification by faith alone has always been controversial.
Yet Paul does not stop at the exclusion of boasting. That would be enough for many preachers. But Paul anticipates an objection. If the law cannot save, and if boasting in law-keeping is excluded, has the law been thrown away? Has God's own revelation become obsolete? That objection is the doorway into the second half of the passage. Paul refuses to leave the law behind as a discarded relic. His next move is one of the most important sentences in the letter, and it has been debated ever since.
Why boasting is excluded and why that is good news
Boasting sounds like a minor sin until you see what it does to a soul. It feeds on comparisons and demands recognition. It turns grace into wages and worship into performance. It makes God a debtor. When Paul says that boasting is excluded, he is not merely policing bad manners. He is protecting the very heart of the gospel. If any part of my salvation depends on me, then some part of my glory depends on me too, and the cross becomes a supplement rather than a complete sacrifice. The exclusion of boasting is therefore inseparable from the exaltation of Christ.
Consider what kind of people the principle of works produces. It produces anxious strivers who never know if they have done enough. It produces self-righteous critics who look down on those who have not achieved their standard. It produces people who talk about grace but live as though everything hangs on their quiet times, their giving, or their family heritage. Paul knew this world intimately. Before Damascus, he was blameless according to the righteousness of the law, and he counted it all as loss for the sake of Christ. His doctrine was hammered out on the anvil of his own former pride.
The principle of faith produces something entirely different. It produces humble confidence, because the work is finished and the Savior is faithful. It produces gratitude rather than entitlement. It produces patience with the weak, because the strong know they were once weak themselves. It produces unity among people who otherwise have nothing in common. If I am saved by faith, then the ground at the foot of the cross is level. No one stands higher. No one is more welcome. That is why Paul immediately moves in verse twenty-nine to ask whether God is the God of the Jews only.
Boasting is also excluded because it is a lie about reality. Every good thing we have is received. Even our faith is not a self-manufactured achievement; it is the gift of God, as Paul argues elsewhere. The moment we take credit, we misread our own story. We are debtors who have been forgiven an unpayable sum, not investors who have earned a return. The person who understands this cannot look at another sinner with contempt. The only proper posture is one hand over the mouth and the other extended in mercy.
Does faith nullify the law of God
Paul raises the objection himself, because he knows how his gospel sounds. If the law cannot justify, and if boasting in law-keeping is excluded, then it seems the law has been cancelled. His answer is emphatic. May it never be. He will not tolerate the idea that justification by faith makes God's commandments irrelevant. This is one of the clearest places in the New Testament where the apostle guards against antinomianism, the notion that grace licenses sin. Paul's gospel is not a doctrine of moral indifference. It produces obedience, though never as the ground of acceptance.
We need to be careful here about what the law means in Paul's argument. He uses the term in more than one sense. Sometimes he means the whole Old Testament Scriptures. Sometimes he means the Mosaic covenant as a system of law-keeping. Sometimes he means the moral commandments, particularly as summarized in the Ten Commandments. In Romans 3:31 he is most likely thinking of the law as God's revelation of his righteous will, the standard by which sin is defined. That standard has not evaporated. If it had, the very word sin would lose its meaning, and the cross would lose its necessity.
Paul will later say in Romans 7 that the law is holy, righteous, and good. He will say that through the law comes the knowledge of sin. He will even say that he delights in the law of God in his inner being. A man who writes those sentences has not dismissed the law. What he has rejected is the law as a means of justification. The law was never designed to make dead sinners alive. It was designed to expose the disease, not cure it. Expecting the law to justify is like expecting a mirror to wash your face. The mirror is doing its job when it tells you the truth.
So when someone claims that preaching grace undermines morality, Paul's answer is ready. True grace does not loosen God's commandments; it supplies a new heart that loves them. The person who has been forgiven much does not ask how little he can obey and still be safe. He asks how he can please the One who loved him and gave himself for him. The law's authority stands. What has changed is the believer's standing, motivation, and power. The law no longer condemns; it now instructs a child rather than sentencing a criminal.
How faith actually establishes the law
Paul's final clause is startling. He says that we establish the law through faith. The word means to make something stand, to uphold it, to confirm it as valid. Faith does not set the law aside; it puts the law on its proper foundation. When we confess that we cannot keep the law and flee to Christ, we are agreeing with the law's verdict. We are admitting that its demands are just and that our failure is real. In that sense, faith honors the law by taking its accusations seriously instead of explaining them away. The law is established precisely because it is believed.
Faith also establishes the law by pointing to the One who fulfilled it. Jesus said in Matthew 5:17, Don't think that I came to destroy the law or the prophets. I didn't come to destroy, but to fulfill. His life was a perfect obedience to every command, and his death bore the curse that the law pronounced on lawbreakers. When we trust Christ, we are trusting the only person who ever established the law fully. Our faith rests on his fulfillment. So the law is not lowered; it is satisfied in him, and his obedience is counted as ours through union with him.
Faith further establishes the law by producing the obedience that the law requires, though always imperfectly in this life. The Spirit writes God's commandments on the heart. The believer begins to love what God loves and hate what God hates. This is not the old covenant pattern of external conformity under threat. It is the new covenant pattern of internal transformation by the Spirit. The law's righteous requirement is fulfilled in us who walk according to the Spirit, not according to the flesh. That is Paul's language in Romans 8:3-4, where he explains that what the law could not do, God did by sending his Son.
Finally, faith establishes the law by refusing to use grace as a cover for sin. Anyone who says I am justified, so obedience does not matter has not understood justification. Faith and repentance are inseparable. The faith that receives Christ also receives his Lordship. The person who claims to know him while walking in darkness is contradicted by the apostle John. So the law stands, not as a ladder to climb, but as the shape of the life that grace produces. Faith upholds it, honors it, and fulfills it in Christ.
Christ fulfilled the law so that we could be justified
Matthew 5:17-20 records Jesus' own insistence that he came not to abolish but to fulfill. This is the anchor that keeps Romans 3:31 from floating into speculation. Jesus did not treat the Old Testament as a rough draft to be discarded. He honored every stroke of the Law and the Prophets. His fulfillment was both doctrinal and moral. Doctrinally, he is the substance of the shadows, the true Passover lamb, the true temple, the true priest, the true sacrifice. Morally, he obeyed the law in thought, word, and deed, succeeding where Israel and Adam failed. His fulfillment is therefore the ground on which our justification rests.
Paul's argument in Romans 3 depends entirely on this. If Christ did not fulfill the law, then the law still stands over us with an unpaid debt. If Christ did fulfill it, then his righteousness is available to all who believe. This is why justification is by faith and not by works. The works were done, but by someone else, in our place. We receive what we did not achieve. That is the structure of the gospel from beginning to end. It excludes boasting because the achievement belongs to Christ, and it establishes the law because the achievement meets the law's full demand.
Romans 8:3-4 explains why this was necessary. The law was weak through the flesh, not weak in itself. The problem was never the commandment; the problem was us. So God sent his own Son in the likeness of sinful flesh, and in that flesh he condemned sin. The verdict against sin was executed on the cross. As a result, the righteous requirement of the law is fulfilled in us who walk according to the Spirit. Notice the direction of the logic. Christ condemned sin so that the law's requirement could be met in a people who are now led by the Spirit. Grace does not suspend the law; it supplies what the law demanded.
Hebrews 10:14-18 adds the finishing note. By one offering he has perfected forever those who are being sanctified. The sacrifice is finished. The worshipper's conscience is cleansed. The covenant promise is that God will remember sins no more. If sins are remembered no more, then there is no more offering for sin, and the law's condemning work toward the believer is complete. What remains is not a new round of condemnation but a life of grateful obedience. The law is established because the penalty it demanded has been paid, and the obedience it required has been supplied in Christ.
Why the law still matters for believers today
Some Christians react to legalism by ignoring the law altogether. That overcorrection is not Paul's. He says we establish the law. The moral law still reveals God's character. It still tells us what love of God and neighbor looks like in concrete terms. It still exposes sin in our lives so that we run again to Christ. It still guides our decisions when Scripture does not give a direct command. The believer who reads the Ten Commandments with new eyes finds not a ladder but a lamp. It shows the path, and it shows how far we have strayed, and it drives us back to the grace that saves.
Others react to grace by adding rules back in. They create a new law of extra-biblical requirements, and then they boast in their observance of it. Paul would recognize the pattern instantly. Any system, whether ancient Judaism or modern traditionalism, that makes acceptance with God depend on our performance is a law of works, and it cannot coexist with the law of faith. Adding rules to the gospel does not strengthen holiness; it creates pride. The remedy is not less obedience but a different foundation. We obey because we are accepted, not in order to be accepted.
The practical shape of establishing the law is therefore humility and diligence together. Humility, because our best obedience is still stained and our standing rests entirely on Christ. Diligence, because the law we now love deserves our sincere effort. We do not obey to secure God's favor; we obey because we already have it in Christ. We do not treat sin lightly; we fight it, knowing that the one who justified us is also sanctifying us. The law is established in a life that takes God's commands seriously while resting completely on God's grace. That is a uniquely Christian posture, and it is a rebuke to both license and legalism.
Finally, the law matters because it points beyond itself to Christ. Every command we fail to keep, every sacrifice that could not cleanse the conscience, every priest who could not perfect the worshipper, all of it cries out for a better mediator. When we read the law rightly, we do not stay there. We follow it to Jesus, who fulfilled it and bore its curse. So faith does not empty the law of meaning. It fills the law with meaning by showing us its Author, its Fulfiller, and its end. We establish the law when we read it as a witness to him.
Where Galatians makes the same case
Galatians 3:21-25 asks whether the law is against the promises of God. Paul answers, Certainly not. The law was never given to make alive, because if it could make alive, righteousness would have come through it. Instead, the law functioned as a guardian until Christ came, so that we might be justified by faith. Once faith has come, we are no longer under that guardian. This is the same structure as Romans 3:31. The law serves a purpose, but it was never the promised deliverer. It points to the promise and then steps aside for its fulfillment.
The circumstances in Galatia help explain Paul's intensity. False teachers were insisting that Gentile converts needed to keep the Mosaic law, particularly circumcision, to be full members of God's people. Paul saw immediately that this was not a minor cultural adjustment. It was a different gospel, because it made justification depend partly on human effort. If that were true, Christ died for nothing. The same error reappears whenever we add conditions to grace, whether ceremonial, cultural, or moral. The moment we make our standing depend on our performance, we have abandoned the law of faith for the law of works.
Yet Paul does not say the law was a mistake. He calls it a guardian, a tutor appointed for a season. A good tutor does not despise the child. He prepares the child for what comes next. The law taught Israel the seriousness of sin and the impossibility of self-salvation. It fenced a people for God and preserved his promises until the seed arrived. Now that faith has come, the tutor's role toward believers has changed, but the lesson remains. We still need to know the depth of our sin and the holiness of God's standard. The law continues to teach us these things, even as it hands us over to Christ.
The link between Galatians and Romans is therefore a unity of doctrine, not a coincidence. Both letters insist that the law cannot justify and that faith does not disparage the law. Both insist that the promises of God are received by faith alone. Both insist that the believer's identity rests in Christ, not in law-keeping. If we understand Romans 3:31, we will read Galatians 3 with recognition. If we understand Galatians 3, we will read Romans 3:31 with confidence. They are two voices singing the same harmony, and the harmony is the gospel.
Biblical fidelity check
What this passage establishes is clear. Paul teaches that boasting is excluded by the principle of faith, that God justifies both Jew and Gentile on the same basis, and that faith upholds rather than nullifies the law. It does not teach that the law is a means of justification, nor that obedience contributes to our standing before God. It does not teach that the moral law has been abolished, nor that believers are free to sin. It does not teach that faith is a meritorious work that earns reward. Faith is the empty hand that receives Christ, not a substitute law-keeping that we perform.
A common misreading says that since we are justified by faith, the law is irrelevant and Christians may live as they please. Paul explicitly denies this in the very verse under discussion. Another misreading says that faith plus something else secures our standing, whether a ritual, an experience, or a moral achievement. That is the law of works Paul excludes. A third misreading treats the law as if it saves, which makes the cross unnecessary. Faithful Christians differ on how specific Old Testament laws apply today, particularly the ceremonial and civil elements, and we should be honest about that. But the core is not disputed: we are justified by faith alone, and faith establishes the law rather than casting it aside.
Other passages that speak to Romans 3:27-31
Several connected studies help fill out this theme. The Beatitudes Explained: Matthew 5:1-12 Meaning shows how Jesus opens the Sermon on the Mount by describing the kingdom character that grace produces, the same internal righteousness he demands in the verses that follow. Paul's Defense of the Gospel in Galatians 1 traces the apostolic authority behind the doctrine of justification by faith. Galatians 2:20 Meaning: Crucified With Christ, Alive by Faith explains the union with Christ that makes both our justification and our obedience possible. And What Does Galatians 3:28 Mean? Context, Theology, and Application shows the unity that results when boasting is excluded and all believers stand on the same footing in Christ. Read together, The Beatitudes Explained: Matthew 5:1–12 Meaning, Paul's Defense of the Gospel in Galatians 1, Galatians 2:20 Meaning: Crucified With Christ, Alive by Faith, and What Does Galatians 3:28 Mean? Context, Theology, and Application form a coherent picture of the gospel Paul preached.
Frequently asked questions
Does Romans 3:31 mean Christians must keep the Mosaic law to be saved?
No. Paul's whole argument in Romans 3 is that righteousness comes through faith apart from works of law. To make law-keeping a condition of salvation would rebuild the law of works he just excluded. What Paul affirms is that faith upholds the law's true purpose. The law reveals sin, points to Christ, and shapes the grateful obedience of the redeemed. It was never designed to justify anyone. Keeping it as a means of salvation contradicts the gospel and empties the cross of its necessity.
What does it mean that boasting is excluded?
It means no one can claim credit for their salvation. If righteousness were earned by works, the worker could boast before God and others. But because it is received by faith in Christ, every ground for pride is removed. The most devout believer and the most desperate sinner are saved on identical terms. Boasting is excluded not because God wants to humiliate us, but because he wants us to see that everything we need was provided by him. This produces humility, gratitude, and unity among believers.
How does faith establish the law rather than nullify it?
Faith establishes the law in three ways. It agrees with the law's verdict that we are sinners who cannot save ourselves. It rests on Christ, who fulfilled the law perfectly and bore its penalty in our place. And it produces Spirit-wrought obedience that honors God's commands, though imperfectly in this life. The law is not torn down; it is placed on its only secure foundation, the finished work of Jesus. Grace does not make the law pointless. It makes the law achievable through the One who fulfilled it for us.
