The book explores the Theology of history, emphasizing how theological interpretations shape scriptural events and liturgy. It discusses the Old and New Testaments, highlighting Christ as the ultimate goal (telos) and central figure in the chronology of salvation history, as outlined by early Christian thinkers such as St. Augustine and later by St. Bonaventure. The text examines controversies, particularly those involving Joachim of Fiore, who proposed a three-part history aligned with the Trinity, and how these debates influenced the Franciscan Order.
In the 1950s, Ratzinger addressed theological dilemmas between Catholic and Lutheran views on salvation history. He centered on the connection between history, metaphysics, and salvation, advocating for a Christ-centric view. The book also delves into the role of Christian liturgy as a connection between cosmic and historical narratives, emphasizing its significance in foreshadowing eternal life. Ratzinger asserts that liturgy, grounded in the Cross and Resurrection, is essential to authentic Christian worship, reinforcing the idea that a faith without liturgy lacks the fullness of Christ.