basis of belief in the divine, and aroused a comparison and discussion of the validity of the various arguments hitherto used by speculative thought, and set them over in sharp contrast to the claims of the new revelation. In the early period when this contrast was most clearly felt, and time had not yet permitted a complete fusion and blending of the two points of view, we find a simplicity of situation which will aid analysis and facilitate the study of the relation of the old arguments for the existence of a God to the Christian doctrine, and which will help in determining the elements due to each and in interpreting the reasons for the direction of thought on this subject, which characterized the whole of the Mediæval period. In the representations of early Christian thought, however, we find great differences in the emphasis laid upon the speculative side of the theistic problem. Christian philosophy is no exception to the rule that the thought of the race develops through the needs, temperaments and tendencies with which it comes into contact, and unfolds itself naturally in response to internal or external stimuli--the doubts, intellectual needs and growing consciousness and experience of the believer, and the cavils, objections and attacks of his opponent. The first Christian teachers had to meet simple problems, and the mission of the Apostolic and sub-Apostolic Church was to "the people." Its first task, determined by the conditions in which the Christians found themselves, as well as by the command of their Master, was to convert the Jews, who, by their long training as a "peculiar people," were especially adapted for receiving this new revelation, based, as it was, on that monotheistic idea to the preservation of which their national life had been devoted. Upon them the primitive Christians, most of whom, like St. Paul, were "Hebrews of the Hebrews," brought to bear the instrument most adapted to their conversion, namely, the argument deduced from the sacred Scriptures of their race. And when the Church finally turned towards the Gentile world, it was still the popular religion, the religion of the poets, rather than the philosophy of the schools, with which its apologists first came into contact, and it is very evident from such writings as the recently recovered _Apology_ of Aristides, "philosopher of Athens," and many other works extending over the whole Ante-Nicene period, that much of the energy of the early exponents of Christianity was directed towards the conversion of the populace who still adhered, at least formally, to the religion of their own poets.