This book, Life in the Trinity is an introduction to Christian theology under the rubric of one unifying rubric: The Trinity. As such, it seeks to unite Theology 'around a single theme' that, author Donald Fairbairn argues, has often been missing from Western theology books. With the aid of the Church Fathers, Fairbairn articulates Christian theology and Life as a continuous participation in the relational Trinity. This book is intended as an introduction to Theology and will serve quite well, one semester courses on Theology, introductory courses in a church, or for persons who are looking to develop or expand their understanding of Christian Theology.