Moral Shape That Salvation Takes
True, the law is not the means of justification, except in the sense that Christ has kept it for us. But its substance is the moral shape that salvation takes. It is, after all, through the gospel-gift of the Spirit that “the law” is written in the heart— not as a “covenant of works,” but as a “rule of life.” Even if we are unfamiliar with this terminology, we need to become familiar with the biblical truth it seeks to express.
Sinclair Ferguson, The Whole Christ: Legalism, Antinomianism, and Gospel Assurance—Why the Marrow Controversy Still Matters (Wheaton, IL: Crossway, 2016), 120-121