使徒信条
Originally published in German in 1968 under the title, "Einführung in das Christentum", Ratzinger restates the Apostles' Creed and the meaning of this foundational text in language that has a greater contemporary resonance than the Creed itself. Like the Apostles' Creed, the book presents the doctrines pertaining to the Father, the Son, and the Spirit in sequence.