The first of a two-volume project delving into the doctrine of justification. Michael Horton seeks not simply to recover a clear message of its role in modern Reformed theology, but also to bring a fresh discovery of the gospel in a time when contemporary debates around justification have reignited. The doctrine of justification stands at the center of our systematic reflection on the meaning of salvation and grace as well as our piety, mission, and life together. And yet, within mainline Protestant and evangelical theology, it's often taken for granted or left to gather dust in favor of modern concerns and self-renewal. Volume 1 is an exercise in historical theology, exploring the doctrine of justification from the patristic era to the Reformation. This book: Provides a map for contemporary discussions of justification, identifying and engaging principal sources: Origen, Chrysostom, Augustine, Thomas Aquinas, John Duns Scotus, William of Ockham, Gabriel Biel, and the magisterial reformers. Studies the transformations of the doctrine through Aquinas, Scotus and the nominalists leading up to the era of the Reformation and the Council of Trent. Concludes by examining the hermeneutical and theological significance of the Reformers' understanding of the law and the gospel and the resultant covenantal scheme that became formative in Reformed theology. Engaging and thorough, Justification will not only reenergize the reader—whether Protestant or Catholic—with a passion for understanding this essential and long-running doctrinal conversation, but also challenge anyone to engage critically with the history of the Church and the heart of the gospel.