Book excerpt: The fifth volume in this epic and classic undertaking by one of the most notable theologians of the Roman Catholic Church. This volume features theological considerations towards such topics as the Incarnation of Jesus Christ and along with the Sacraments and other important topics that we often take for granted in our thinking in the church and in worship towards God. These topics must be carefully considered if we are to ever have a deep understanding and love of the one true God and his son Jesus Christ.