"The Whole Christ" by Sinclair Ferguson explores the historical Marrow Controversy within the context of Reformed theology. The book delves into the tensions between legalism, which emphasizes strict adherence to the law, and antinomianism, which dismisses the law's importance. Ferguson argues that both extremes distort the true gospel message of grace and assurance found in Christ. Ferguson draws on the insights from the 18th-century Marrow controversy, where theologians debated the nature of the law and grace. He examines how this debate is relevant today, as many contemporary believers struggle with understanding their relationship to the law in light of the gospel. The author emphasizes that a robust understanding of both the law and grace is crucial for genuine Christian faith. The book ultimately encourages readers to embrace the security and assurance that the gospel provides, pointing to Christ as the fulfillment of both law and grace. Ferguson's work serves as a reminder of the importance of theological clarity and the dangers of misinterpreting the role of law in the believer's life, highlighting why the Marrow Controversy remains significant for modern Christianity.