Grace and Law: How Paul's Letters Resolve the Tension

The tension between grace and law is one of the most debated questions in Christian theology. In some churches, it produces legalism: lists of rules and the constant anxiety of never doing quite enough. In others, it produces the opposite: a "grace" so permissive that behaviour no longer matters. Both distortions can quote Paul in support.

Paul himself anticipated both misreadings. In Romans 6:1 he raises the antinomian question directly: "Shall we continue in sin, that grace may abound?" And in Romans 3:31 he preempts the charge that grace destroys law: "Do we then make void the law through faith? God forbid: yea, we establish the law."

Understanding how Paul navigates between these poles requires understanding his different uses of the word "law" — because he does not always mean the same thing by it.

Paul's Multiple Uses of "Law"

In Galatians and Romans, "law" (Greek nomos) functions in at least three distinct ways:

1. The Mosaic Law as covenant obligation. This is the 613 commandments given at Sinai, understood as the terms of the national covenant between God and Israel. Paul argues that Gentile believers are not under this covenant as Gentiles, and that Jewish believers have entered a new covenant in Christ that does not require circumcision and food laws as covenant markers.

2. The law as a moral teacher revealing the nature of sin. "I had not known sin but by the law: for I had not known lust, except the law had said, Thou shalt not covet" (Romans 7:7). The law is not the problem — it diagnoses the problem. Its role in this sense is permanent and good.

3. The principle of "works-based" standing before God. "No man is justified by the works of the law in the sight of God" (Galatians 3:11). Here "law" represents the system of earning divine favour through moral performance. This system Paul argues is fundamentally broken — not because the law is wrong, but because human beings, corrupted by sin, cannot satisfy it.

The Purpose of the Law in Galatians

Galatians 3:19–25 contains Paul's clearest extended statement of the law's purpose. The law was added "because of transgressions" (3:19) — not as the path to life, but as a revelatory instrument that made sin visible, held Israel under its discipline, and pointed toward Christ. "The law was our schoolmaster to bring us unto Christ" (3:24).

A schoolmaster (Greek paidagogos) in the ancient world was not a teacher but a guardian — often a household slave responsible for keeping the children safe until they were of age. The law's role was custodial and temporary, designed to lead God's people to the moment when faith in Christ would be the governing reality.

"But after that faith is come, we are no longer under a schoolmaster" (3:25). This does not mean the law no longer teaches us. It means the custodial function — keeping us through a period of minority — has been superseded by sonship.

"For sin shall not have dominion over you: for ye are not under the law, but under grace. What then? shall we sin, because we are not under the law, but under grace? God forbid." — Romans 6:14–15

Does Grace Abolish Obedience?

Romans 6 is Paul's extended answer to the antinomian question. His argument is not "yes, but try to be good." It is a theological statement about identity. The person who is united with Christ in his death and resurrection has died to sin. Continuing in sin is not just disobedience — it is incoherence. You cannot simultaneously claim to be dead to sin and alive to it.

"Shall we continue in sin, that grace may abound? God forbid. How shall we, that are dead to sin, live any longer therein?" (Romans 6:1–2). The "God forbid" — the Greek mē genoito — is Paul's strongest possible expression of horror at the idea.

The point is not that the believer must strive harder. It is that the believer has been transferred to a new domain. "Sin shall not have dominion over you" is a statement of status, not a command. The command that follows ("yield yourselves unto God," 6:13) is addressed to people who already are not under sin's dominion — the command is to act consistently with who they already are.

The Law Written on the Heart

Romans 8:3–4 resolves the question from a different angle: "For what the law could not do, in that it was weak through the flesh, God sending his own Son in the likeness of sinful flesh, and for sin, condemned sin in the flesh: that the righteous requirement of the law might be fulfilled in us, who walk not after the flesh, but after the Spirit."

The law's righteous requirements are not abandoned in the new covenant — they are fulfilled, in us, by the Spirit. This is the content of Jeremiah's new covenant promise: "I will put my law in their inward parts, and write it in their hearts" (Jeremiah 31:33). Not law abandoned but law internalised, obeyed not through external compulsion but through the Spirit's transforming work.

The resolution of the grace-law tension is neither legalism nor license. It is a new creation, motivated by gratitude and enabled by the Spirit, living out what the law always pointed toward: love for God and neighbour, from the inside out.

Reflection: Where in your Christian life are you most tempted toward legalism — earning favour through performance? And where are you tempted toward license — treating grace as permission to be careless? What does Romans 6:1–14 say to each temptation?