Book excerpt: Could it be that we have lost touch with some basic human realities in our day of high-tech efficiency, frenetic competition, and ceaseless consumption? Have we turned from the moral, the spiritual, and even the physical realities that make our lives meaningful? These are metaphysical questions -questions about the nature of reality- but they are not abstract questions. These are very down to earth questions that concern power and the collective frameworks of belief and action governing our daily lives. This book is an introduction to the history, theory, and application of Christian metaphysics. Yet this book is not just an introduction, it is also a passionately argued call for a profound change in the contemporary Christian mind. Paul Tyson argues that as Western culture's Christian Platonist understanding of reality was replaced by modern pragmatic realism, we turned not just from one outlook on reality to another, but away from reality itself. This book seeks to show that if we can recover this ancient Christian outlook on reality, reframed for our day, then we will be able to recover a way of life that is in harmony with human and divine truth.