"My purpose, and I believe it is a justified purpose, has been to present the method and the structure of a theological system written from an apologetic point of view and carried through in a continuous correlation with philosophy ... A help in answering questions: this is exactly the purpose of this theological system." (Paul Tillich, Systematic Theology , three volumes in one, The University of Chicago, 1967, xi-xii). Comment - We live in a world where we will be asked questions. We must "always be ready to give a defence to anyone who asks us for a reason for the hope that is in us" (1 Peter 3:15). "Theology, as a function of the Christian church, must serve the needs of the church. A theological system is supposed to satisfy two basic needs, the statement of the truth of the Christian message and the interpretation of this truth for every new generation. Theology moves back and forth between two poles, the eternal truth of its foundation and...