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 (Benedict XVI) is recognized as one of the most brilliant theologians and spiritual leaders of our age. As pope he authored the best-selling Jesus of Nazareth. Prior to his pontificate, he wrote many influential books important for the contemporary Church, such as Introduction to Christianity and The Spirit of the Liturgy.