St. Thomas’ account of the human person expounds upon what philosophers and theologians from ancient times to his day have said about ourselves and our unique place in God’s universe. While Thomas discusses and references his views on human nature in nearly all his works, his ex professo treatment of the question can be found in questions 75 through 89 of the first part of his Summa Theologiae. While the context of this treatise is theological, Thomas’ consideration includes an extended and integrated philosophical account of what we are, what we can expect of life, and why. Addressing issues as wide-ranging as whether and to what degree we can really know the world about us, upon what basis we can stake our claim to free action, and whether we can certainly know, as Socrates is to have said, that “our souls will truly exist in another world!”, Thomas brings his brilliance to bear upon a discussion and resolution of life’s most important questions.