The Triune God, together with the forthcoming second volume, The Works of God, develops a compendious statement of Christian theology in the tradition of a medieval summa, or of such modern works as those of Schleiermacher and Barth. Theology, as it is understood here, is the Christian church's continuing discourse concerning her specific communal purpose; it is the hermeneutic and critical reflection internal to the church's task of speaking the gospel, to the world as message and to God in petition and praise. This volume and its successor are thus dedicated to the service of the one church of the creeds; it is for no particular denomination or confession.