There only remains to be briefly noticed the relation of philos ophy to theology and the nature of what is called Philosophy of Religion. By theology is commonly understood the syste matic presentation of the teaching of some positive or historical religion as to the existence and attributes of a Supreme Being, including his relation to the world and especially to man. But
these topics have also been treated by philosophers and religious thinkers, without dependence on any historical data or special divine revelation, under the title of Natural Theology. Natural Theology is specially associated with the Stoic theories of provi dence in ancient times and with elaborations of the argument from design in the i8th century. But there is no warrant for restricting the term to any special mode of approaching the problems indicated ; and as these form the central subject of metaphysical inquiry, no valid distinction can be drawn between natui ai theology and general metaphysics. The philosophy of religion, on the other hand, investigates the nature of the religious consciousness and the value of its pronouncements on human life and man's relation to the ground of things. Unity, reconciliation, peace, joy, "the victory that overcometh the world"—such, in slightly varying phrases, is the content of religious faith. Does this consciousness represent an authentic insight into ultimate fact, or is it a pitiful illusion of the nerves, born of man's hopes and fears and of his fundamental ignorance? The philosophy of religion assumes the first alternative. The function of philosophy in general is the reflective analysis of experience, and the religious experience of mankind is prima facie entitled to the same consid eration as any other form of conscious activity. The certainties of religious faith are matters of feeling or immediate assurance, and are expressed in the pictorial language of imagination. It be comes the function of philosophy, dealing with these utterances, to relate them to the results of other spheres of experience, and to determine their real meaning in the more exact terms of thought.
The philosophy of religion also traces in the different historical forms of religious belief and practice the gradual evolution of what it takes to be the truth of the matter. Such an account may be distinguished from what is usually called the science of religion by the teleological or metaphysical presuppositions it involves. The science of religion gives a purely historical and comparative account of the various manifestations of the religious instinct without pronouncing on their relative truth or value and without, therefore, professing to apply the idea of evolution in the philo sophical sense. That idea is fundamental in the philosophy of re ligion, which therefore can be written only from the standpoint of a constructive metaphysical theory.
It is, indeed, only from the standpoint of such a theory that the definitions and divisions of the different philosophical disci plines adopted in this article can be said to hold good. But those who, like the positivist, agnostics and sceptics, deny the possibil ity of ontology as a theory of the ultimate nature of things, are still obliged to retain philosophy as a theory of knowledge, in order to justify the asserted limitation or impotence of human reason.