Since the days of the early church, Christians have struggled to understand the relationship between two seemingly contradictory concepts in the Bible: law and gospel. If, as the apostle Paul says, the law cannot save, what can it do? Is it merely an ancient relic from Old Testament Israel to be discarded? Or is it still valuable for Christians today? Helping modern Christians think through this complex issue, seasoned pastor and theologian Sinclair Ferguson carefully leads readers to rediscover an eighteenth-century debate that sheds light on this present-day doctrinal conundrum: the Marrow Controversy. After sketching the history of the debate, Ferguson moves on to discuss the theology itself, acting as a wise guide for walking the path between legalism (overemphasis on the law) on the one side and antinomianism (wholesale rejection of the law) on the other.

Since the days of the early church, Christians have wrestled with the relationship between law and gospel. If, as the apostle Paul says, salvation is by grace and the law cannot save, what relevance does the law have for Christians today?

By revisiting the Marrow Controversy¿a famous but largely forgotten eighteenth-century debate related to the proper relationship between God's grace and our works¿Sinclair B. Ferguson sheds light on this central issue and why it still matters today. In doing so, he explains how our understanding of the relationship between law and gospel determines our approach to evangelism, our pursuit of sanctification, and even our understanding of God himself.

Ferguson shows us that the antidote to the poison of legalism on the one hand and antinomianism on the other is one and the same: the life-giving gospel of Jesus Christ, in whom we are simultaneously justified by faith, freed for good works,...