“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, 1 John 3:4; 5:3.”
Louis Berkhof, Systematic Theology (Grand Rapids: Wm. B. Eerdmans publishing co., 1938), 613.