A collection of articles and talks written around a central theme the fundamental structure of Christianity: Catholicism, the inter-relationship of other forms of Christianity, the features that distinguish Catholicism from other Christian theologies. Ratzinger outlines the fundamental principles of theology and the proper relationship of theology to Church teaching and authority.
Joseph Ratzinger, now Pope Benedict XVI, was for over two decades The Prefect for the Congregation for the Doctrine of the Faith under Pope John Paul II. He is the author of Spirit of the Liturgy, Salt of the Earth, Introduction to Christianity, God and the World, Milestones, Called to Communion, God Is Near Us, and many other works published by Ignatius Press.