As theology deals with objective facts and their relations, so its arrangement of these facts is not optional, but is determined by the nature of the material with which it deals. A true theology thinks over again God’s thoughts and brings them into God’s order, as the builders of Solomon’s temple took the stones already hewn, and put them into the places for which the architect had designed them; Reginald Heber: “No hammer fell, no ponderous axes rung; Like some tall palm, the mystic fabric sprung.” Scientific men have no fear that the data of physics will narrow or cramp their intellects; no more should they fear the objective facts which are the data of theology. We cannot make theology, any more than we can make a law of physical nature. As the natural philosopher is “Naturæ minister et interpres,” so the theologian is the servant and interpreter of the objective truth of God. On the Idea of Theology as a System, see H. B. Smith, Faith and Philosophy, 126-166. III. Possibility of Theology. The possibility of theology has a threefold ground: 1. In the existence of a God who has relations to the universe; 2. In the capacity of the human mind for knowing God and certain of these relations; and 3. In the provision of means by which God is brought into actual contact with the mind, or in other words, in the provision of a revelation. Any particular science is possible only when three conditions combine, namely, the actual existence of the object with which the science deals, the subjective capacity of the human mind to know that object, and the provision of definite means by which the object is brought into contact with the mind. We may illustrate the conditions of theology from selenology—the science, not of “lunar politics,” which John Stuart Mill thought so vain a pursuit, but of lunar physics. Selenology has three conditions: 1. the objective existence of the moon; 2. the subjective capacity of the human mind to know the moon; and 3. the provision of some means (_e. g._, the eye and the telescope) by which the gulf between man and the moon is bridged over, and by which the mind can come into actual cognizance of the facts with regard to the moon. 1. The existence of a God. _In the existence of a God who has relations to the universe._—It has been objected, indeed, that since God and these relations are objects apprehended only by faith, they are not proper objects of knowledge or subjects for science. We reply: