The standard work of theology, now translated into many languages, is available in a revised 10th edition with a new preface. Cardinal Gerhard Müller unifies the twelve treatises of dogmatics in his textbook. The author connects the specific elements of traditional dogmatics with the question of how to convey faith and its contents in the modern world, highlighting the interdependencies and complements that lead to an expansion of perspectives within the entire field. This is done in a language that invites students, educators, and those interested in theology to engage with the contents of the Catholic faith.