To distinguish law and gospel is not to oppose them as enemies. The antinomian error is as dangerous as the legalist error, and Reformed theology explicitly rejects both.

If the social media posts, YouTube clips, and Facebook groups of prominent Evangelical and so-called “Reformed” pastors serve as any barometer of theological health, a pastoral crisis is hiding in plain sight.

When a pastor can not distinguish law from gospel, his congregation will either be crushed under a burden they cannot bear, or settle into the smug ease of a Pharisee who is quite satisfied with his own righteousness.

Francis Turretin went straight to the root of the problem: the Judaizing false apostles had erred by “rashly confounding the law with the gospel, Moses with Christ.”1 Paul diagnosed it in the first century. Turretin diagnosed it in the seventeenth. The names change, but the confusion doesn’t. Reformed theology has labored for five centuries to prevent it, and to explain why preventing it is an act of mercy.

Defining the Terms

Before the distinction of the law and gospel can be maintained, the terms must be defined. The Reformed tradition has never treated law and gospel as synonyms for the Old and New Testaments. Louis Berkhof stated the matter plainly:

“The law comprises everything in Scripture which is a revelation of God’s will in the form of command or prohibition, while the gospel embraces everything, whether it be in the Old Testament or in the New, that pertains to the work of reconciliation and that proclaims the seeking and redeeming love of God in Christ Jesus.”2

There is law in the New Testament and gospel in the Old. The Psalms overflow with grace; Romans overflows with commands. The distinction is of content and purpose, not of Testament.

The Second Helvetic Confession is equally precise on the law’s purpose:

“We teach that this law was not given to men that they might be justified by keeping it, but that rather from what it teaches we may know (our) weakness, sin and condemnation, and, despairing of our strength, might be converted to Christ in faith.” (Second Helvetic Confession, Chapter XII)

The law is good, holy, and a perfect expression of God’s will, but its purpose has never been to justify sinners.

Zacharias Ursinus, the principal author of the Heidelberg Catechism, put it sharply: “The law works wrath, and is the ministration of death: the gospel is the ministration of life and of the Spirit.”3

The law demands a righteousness we must supply; the gospel offers a righteousness Christ has already supplied. These are not matters of degree but of kind.

The Contrast Stated

Herman Bavinck, in his Reformed Dogmatics, expands this distinction into the most comprehensive parallel statement in the Reformed tradition. The two are different in their origin, audience, and effect:

“The law proceeds from God’s holiness, is known from nature, addresses all people, demands perfect righteousness, gives eternal life by works, and condemns. By contrast, the gospel proceeds from God’s grace, is known only from special revelation, addresses only those who hear, grants perfect righteousness, produces good works in faith, and acquits.”4

This is the structural architecture of redemptive history.

Turretin presses the same point negatively. The Neonomian error transforms the gospel into a new and gentler law, with faith and good works as the revised conditions of justification. Their object, he writes, “is no other than to transform the gospel into a new law, and so to establish the righteousness of works in the place of the righteousness of faith.”5

The Threefold Use of the Law: The Reformed Contribution

To say that law and gospel are properly distinguished is not to say the law is abolished or hostile to grace. This is where the Reformed tradition makes its most distinctive contribution: the threefold use of the law. For a fuller treatment, see The Three Uses of the Law in Reformed Theology.

The First Use – Pedagogical: The law serves as a mirror, exposing sin and driving the sinner to despair of his own righteousness. Turretin describes it vividly: “it brings man to a knowledge of sin and convinces him of his guilt — ‘by the law is the knowledge of sin’ (Rom. 3:20). Thus it is like a mirror in which we see our blemishes.”6

This is the law as schoolmaster. It does not save, but it drives the convicted sinner out of his self righteousness and to Christ alone.

The Second Use – Civil: The law restrains evil in society. Even among the unregenerate, the threat of divine judgment curbs outward lawlessness: “restraining and checking men by its commands and threatenings…it is like a bit, holding sinners within the bars of external discipline.”6

This explains why the law of God is written on every human conscience (Rom. 2:14-15), even apart from saving grace.

Read More

1. Francis Turretin, Institutes of Elenctic Theology, vol. 2, 158.
2. Louis Berkhof, Systematic Theology, 612.
3. Zacharias Ursinus, Commentary on the Heidelberg Catechism, 497–498.
4. Herman Bavinck, Reformed Dogmatics, vol. 4, 441–442.
5. Turretin, Institutes of Elenctic Theology, vol. 2, 20.
6. Turretin, Institutes of Elenctic Theology, vol. 2, 139.