1. The Law and The Gospel in the Word of God
The Churches of the Reformation from the very beginning distinguished between the law and the gospel as the two parts of the Word of God as a means of grace. This distinction was not understood to be identical with that between the Old and the New Testament, but was regarded as a distinction that applies to both Testaments. There is law and gospel in the Old Testament, and there is law and gospel in the New. 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. And each one of these two parts has its own proper function in the economy of grace. The law seeks to awaken in the heart of man contrition on account of sin, while the gospel aims at the awakening of saving faith in Jesus Christ. The work of the law is in a sense preparatory to that of the gospel. It deepens the consciousness of sin and thus makes the sinner aware of the need of redemption. Both are subservient to the same end, and both are indispensable parts of the means of grace. This truth has not always been sufficiently recognized. The condemning aspect of the law has sometimes been stressed at the expense of its character as a part of the means of grace. Ever since the days of Marcion there have always been some who saw only contrast between the law and the gospel and proceeded on the assumption that the one excluded the other. They based their opinion in part on the rebuke which Paul administered to Peter (Gal. 2:11-14), and partly on the fact that Paul occasionally draws a sharp distinction between the law and the gospel and evidently regards them as contrasts, II Cor. 3:6-11; Gal. 3:2,3.10-14; cf. also John 1:17. They lost sight of the fact that Paul also says that the law served as a tutor to lead men to Christ, Gal. 3:24, and that the Epistle to the Hebrews represents the law, not as standing in antithetical relation to the gospel, but rather as the gospel in its preliminary and imperfect state.2. Necessary Distinctions Respecting the Law and the Gospel.
a. As was already said in the preceding, the distinction between the law and the gospel is not the same as that between the Old and the New Testament. Neither is it the same as that which present day Dispensationalists make between the dispensation of the law and the dispensation of the gospel. It is contrary to the plain facts of Scripture to say that there is no gospel in the Old Testament, or at least not in that part of the Old Testament that covers the dispensation of the law. There is gospel in the maternal promise, gospel in the ceremonial law, and gospel in many of the Prophets, as Isa. 53 and 54; 55:1-3, 6.7; Jer. 31:33, 34; Ezek. 36:25-28. In fact, there is a gospel current running through the whole of the Old Testament, which reaches its highest point in the Messianic prophecies. And it is equally contrary to Scripture to say that there is no law in the New Testament, or that the law does not apply in the New Testament dispensation. Jesus taught the permanent validity of the law, Matt. 5:17-19. Paul says that God provided for it that the requirements of the law should be fulfilled in our lives, Rom. 8:4, and holds his readers responsible for keeping the law, Rom. 13:9. James assures his readers that he who transgresses a single commandment of the law (and he mentions some of these), is a transgressor of the law, Jas. 2:8-11. And John defines sin as “lawlessness,” and says that this is the love of God, that we keep His commandments, I John 3:4; 5:3.The Threefold Use of the Law
1. A usus politicus or civilis. The law serves the purpose of restraining sin and promoting righteousness. Considered from this point of view, the law presupposes sin and is necessary on account of sin. It serves the purpose of God’s common grace in the world at large. This means that from this point of view it cannot be regarded a means of grace in the technical sense of the word.The difference between the Lutheran and the Reformed on this point.
There is some difference between the Lutherans and the Reformed with respect to this threefold use of the law. Both accept this threefold distinction, but the Lutherans stress the second use of the law. In their estimation the law is primarily the appointed means for bringing men under conviction of sin and thus indirectly pointing the way to Jesus Christ as the Savior of sinners. While they also admit the third use of the law, they do it with a certain reserve, since they hold that believers are no more under the law. According to them the third use of the law is necessary only because, and in so far as, believers are still sinners; they must be held in check by the law, and should become ever-increasingly conscious of their sins. It is not surprising therefore that this third use of the law occupies no important place in their system. As a rule they treat of the law only in connection with the doctrine of human misery. The Reformed do full justice to the second use of the law, teaching that “through the law cometh the knowledge of sin,” and that the law awakens the consciousness of the need of redemption; but they devote even more attention to the law in connection with the doctrine of sanctification. They stand strong in the conviction that believers are still under the law as a rule of life and of gratitude. Hence the Heidelberg Catechism devotes not less than eleven Lord’s Days to the discussion of the law, and that in its third part, which deals with gratitude.