In this ground-breaking work, T.F. Torrance aims to clarify understanding of the most profound article of Christian Faith, the doctrine of the Holy Trinity. The Trinity is gounded upon God's historical self-revelation in Jesus Christ. It is presented in this work as teaching which is implicit in the New Testament revelation and in the worship of the Early Church, rather than as a logical derivation from other aspects of Christian doctrine. Adopting a holistic approach, Torrance explains the inter-relatedness of the three Persons - Father, Son and Holy Spirit - and their dynamic Communion in the Truine Being and Nature of God. Combining immense academic range with new theological perpectives, Torrance expounds the basic teaching of the ancient Catholic Church and builds a significant bridge between ancient and modern, Catholic and Evangelical theory. Thomas F. Torrance is Emeritus Professor of Christian Dogmatics, University of Edinburgh.