In this book, John Colquhoun helps us understand the importance of knowing the relationship between law and gospel. Colquhoun especially excels in showing how important the law serves as a believer’s rule of life without compromising the freeness and fullness of the gospel. In one of the greatest Reformed studies of the topic, Colquhoun encourages believers to combat legalism and antinomianism by joyfully embracing a correct view of the law.

"The subject of this treatise," writes Colqohoun, "is in the highest degree, important and interesting, both to saints and to sinners. To know it experimentally, is to “be wise unto salvation;” and to live habitually under the influence of it, is to be at once holy and happy. To have spiritual and distinct views of it, is the way to be kept from verging towards self-righteousness, on the one hand, and licentiousness, on the other; and to be enabled to assert, the absolute freeness of sovereign grace, and at the same time, the sacred interests of true holiness. Without an experimental knowledge, and an unfeigned faith, of the law and the gospel, a man can neither venerate the authority of the one, nor esteem the grace of the other." This classic is organized as follows: Introduction Chapter I. Of the Law of God in General Chapter II. Of the Law of God as Promulgated to the Israelites From Mount Sinai Chapter III. Of the Properties of the Moral Law Chapter IV. The Rules for Understanding Aright the Ten Commandments Chapter V. Of the Gospel of Christ Chapter VI. Of the Uses of the Gospel, and of the Law in Subservience to the Gospel Chapter VII. Of the Difference Between the Law and the Gospel Chapter VIII. Of the Agreement Between the Law and the Gospel Chapter IX. Of the Establishment of the Law by the Gospel Chapter X. Of the Believer’s Privilege of Being Dead to the Law as a Covenant of Works, With a Highly Important Consequence of It Chapter XI. Of the High Obligations Under Which Believers Lie, to Yield Even Perfect Obedience to the Law as a Rule of Life Chapter XII. Of the Nature, Necessity, and Desert of Good Works To the Reader

We live in a day when few professing Christian understand either the law or the gospel, much less their relationship to each other. In this rare treatment of law and gospel, Colquhoun addresses the moral law, the ten commandments, the gospel, the differences between the law and the gospel, the agreement between the law and the gospel, the necessity of good works, and many other relevant issues on this important topic.