Explore the profound journey of one of Christianity's most influential theologians—Augustine of Hippo—and discover how his groundbreaking sacramental theology shaped the course of Western Christianity for over a millennium. This meticulously researched volume traces the transmission, transformation, and enduring legacy of Augustine's ideas from the waning days of the Roman Empire through the dynamic ecclesiastical reforms of the eleventh-century Gregorian movement.

Michael Young offers readers an unparalleled deep dive into the theological, historical, and cultural currents that carried Augustine's vision of the sacraments as visible signs of invisible grace into diverse medieval contexts. Through detailed analyses of key figures—Isidore of Seville, Bede the Venerable, Alcuin of York—and pivotal moments like the Carolingian Renaissance and the Investiture Controversy, the book unveils the intellectual vitality and pastoral urgency that propelled these reforms.

More than a historical study, this book reveals how Augustine's theology became the foundation for vital Church doctrines on baptism, the Eucharist, penance, ordination, and liturgical life—concepts that continue to influence Christian practice today. With its rich narrative and rigorous scholarship, this work appeals to theologians, historians, and anyone fascinated by the enduring power of ideas to shape faith and society.

Discover how the timeless insights of Augustine's sacramental thought were not merely preserved but actively adapted to meet the spiritual and institutional challenges of their times—culminating in reforms that transformed the medieval Church and set the stage for modern Christianity.