The treatises in this volume begin and end with this same point: Justification is by faith and faith alone. Composed under different circumstances by giants of the Reformed tradition—Theodore Beza (1519–1605), Amandus Polanus (1561–1610), and Francis Turretin (1623–87)—they represent various approaches to the same doctrine. Presented in English for the first time, these texts proved the article on which the Church stands or falls from exegetical, systematic, academic, and polemical perspectives. Together they offer a new window into post-Reformational thought theological concerns, including the nature of faith, good works, sanctification, union with Christ, the Holy Spirit, hermeneutics, the unity of Scripture, and more.