The third volume of newly translated selections from the writings of Saint Thomas Aquinas, Fr. Richard Regan turns to his thoughts on the moral dimensions of human action. Focusing on the first part of the second folume of the "Summa Theologiae, " he deals with such topics as the ultimate human goal, human acts, emotions and virtues. Regan indicates that though Aquinas approaches these topics from the perspective of human reason, it is necessary for the reader to remember that his overall viewpoint is that of a believer seeking to understand his faith. All can weigh the merits of these propositions due to their clarity of language, exposition, and structure.