First published in 1985 as Les sources de la morale chrétienne by University Press Fribourg, this work has been recognized by scholars worldwide as one of the most important books in the field of moral theology. Already its acclaim has warranted translations into Spanish, Italian, and Polish. Now it is available for the first time in an English translation, which includes a new preface. Writing in a tone that is reconciliatory rather than polemical, Servais Pinckaers returns Christian ethics to its sources, the Gospel and the Holy Spirit. After discussing the complementary domains of morality and the behavioral and natural sciences, he traces the scriptural themes-particularly in the Sermon on the Mount and the writings of St. Paul-that most influence moral instruction. He then examines in depth the history of moral theology from the patristic period to the present day. This history includes a discussion of the relation of Protestant and Catholic views of Christian ethics. The unique