Among the doctrines and symbols of Christianity perhaps none has been as subject to theological neglect as that of the Trinity. Recently, however, there have been stirrings in the theological world seeking to remedy this neglect. The present volume, a historical and systematic investigation of the doctrine of the Trinity, is intended as one contribution to this renewed theological discussion of the trinity of God. In the first part, the author examines the New Testament matrix of an emerging trinitarianism, the shaping of the tradition by the Greek fathers, and the systematization of the doctrinein Augustine and medieval Scholasticism. The second part explores the post-Enlightenment understanding of the Trinity in Schleiermacher and Hegel and the twentieth-century interpretation of Barth, Tillich, Rahner, Pannenberg, Moltmann, Muhlen, Whitehead, and others.
The historical and critical parts lay the foundation for the third part of this study, a contemporary reinterpretation of the Trinity which complements Aquinas's metaphysical concept of "person" with psychological and subjective dimensions brought out by contemporary thinkers. The result of the rethinking of the Trinity is an understanding of God not as self-enclosed Absolute but as self-communicating personal deity.