world, and to rob it of its dearest possession, belief in the Almighty God of creation and redemption, then Catholicism, inasmuch as it secured this belief for the Greeks, preserved the Old Testament, and supplemented it with early Christian writings, thereby saving—as far as documents, at least, were concerned—and proclaiming the authority of an important part of primitive Christianity, must in one respect be acknowledged as a conservative force born from the vigour of Christianity. If we put aside abstract considerations and merely look at the facts of the given situation, we cannot but admire a creation which first broke up the various outside forces assailing Christianity, and in which the highest blessings of this faith have always continued to be accessible. If the founder of the Christian religion had deemed belief in the Gospel and a life in accordance with it to be compatible with membership of the Synagogue and observance of the Jewish law, there could at least be no impossibility of adhering to the Gospel within the Catholic Church.

Still, that is only one side of the case. The older Catholicism never clearly put the question, "What is Christian?" Instead of answering that question it rather laid down rules, the recognition of which was to be the guarantee of Christianism. This solution of the problem seems to be on the one hand too narrow and on the other too broad. Too narrow, because it bound Christianity to rules under which it necessarily languished; too broad, because it did not in any way exclude the introduction of new and foreign conceptions. In throwing a protective covering round the Gospel, Catholicism also obscured it. It preserved Christianity from being hellenised to the most extreme extent, but, as time went on, it was forced to admit into this religion an ever greater measure of secularisation. In the interests of its world-wide mission it did not indeed directly disguise the terrible seriousness of religion, but, by tolerating a less strict ideal of life, it made it possible for those less in earnest to be considered Christians, and to regard themselves as such. It permitted the genesis of a Church, which was no longer a communion of faith, hope, and discipline, but a political commonwealth in which the Gospel merely had a place beside other things.³ In ever increasing measure it invested all the forms which this secular commonwealth required with apostolic, that is, indirectly, with divine authority. This course disfigured Christianity and made a knowledge of what is Christian an obscure and difficult matter. But, in Catholicism, religion for the first time obtained a formal dogmatic system. Catholic Christianity discovered the formula which reconciled faith and knowledge. This formula satisfied humanity for centuries, and the blessed effects which it accomplished continued to operate even after it had itself already become a fetter.

Catholic Christianity grew out of two converging series of developments. In the one were set up fixed outer standards for determining what is Christian, and these standards were proclaimed to be apostolic institutions. The baptismal confession was exalted to an apostolic rule of faith, that is, to an apostolic law of faith. A collection of apostolic writings was formed from those read in the Churches, and this compilation was placed on an equal footing with the Old Testament. The episcopal and monarchical constitution was declared to be apostolic, and the attribute of successor of the Apostles was conferred on the bishop. Finally, the religious ceremonial developed into a celebration of mysteries, which was in like manner traced back to the Apostles. The result of these institutions was a strictly exclusive Church in the form of a communion of doctrine, ceremonial, and law, a confederation which more and more gathered the various communities within its pale, and brought about the decline of all nonconforming sects. The confederation was primarily based on a common confession, which, however, was not only conceived as "law," but was also very soon supplemented by new standards. One of the most important problems to be investigated in the history of dogma, and one which unfortunately cannot be completely solved, is to show what necessities led to the setting up of a new canon of Scripture, what circumstances required the appearance of living authorities in the communities, and what relation was established between the apostolic rule of faith, the apostolic canon of Scripture, and the apostolic office. The development ended with the formation of a clerical class, at whose head stood the bishop, who united in himself all conceivable powers, as teacher, priest, and judge. He disposed of the powers of Christianity, guaranteed its purity, and therefore in every respect held the Christian laity in tutelage.

But even apart from the content which Christianity here received, this process in itself represents a progressive secularising of the Church, This would be self-evident enough, even if it were not confirmed by noting the fact that the process had already been to some extent anticipated in the so-called Gnosticism (See vol. I. p. 253 and Tertullian, de præscr. 35). But the element which the latter lacked, namely, a firmly welded, suitably regulated constitution, must by no means be regarded as one originally belonging and essential to Christianity. The depotentiation to which Christianity was here subjected appears still more plainly in the facts, that the Christian hopes were deadened, that the secularising of the Christian life was tolerated and even legitimised, and that the manifestations of an unconditional devotion to the heavenly excited suspicion or were compelled to confine themselves to very narrow limits.

But these considerations are scarcely needed as soon as we turn our attention to the second series of developments that make up the history of this period. The Church did not merely set up dykes and walls against Gnosticism in order to ward it off externally, nor was she satisfied with defending against it the facts which were the objects of her belief and hope; but, taking the creed for granted, she began to follow this heresy into its own special territory and to combat it with a scientific theology. That was a necessity which did not first spring from Christianity's own internal struggles. It was already involved in the fact that the Christian Church had been joined by cultured Greeks, who felt the need of justifying their Christianity to themselves and the world, and of presenting it as the desired and certain answer to all the pressing questions which then occupied men's minds.

The beginning of a development which a century later reached its provisional completion in the theology of Origen, that is, in the transformation of the Gospel into a scientific system of ecclesiastical doctrine, appears in the Christian Apologetic, as we already find it before the middle of the second century. As regards its content, this system of doctrine meant the legitimising of Greek philosophy within the sphere of the rule of faith. The theology of Origen bears the same relation to the New Testament as that of Philo does to the Old. What is here presented as Christianity is in fact the idealistic religious philosophy of the age, attested by divine revelation, made accessible to all by the incarnation of the Logos, and purified from any connection with Greek mythology and gross polytheism.⁴ A motley multitude of primitive Christian ideas and hopes, derived