proof that they did not separate the Old Testament God from the Christian Deity.[631] In connection with this we observe that the radical antijudaism of the earliest period more and more ceases. Irenaeus and Tertullian admitted that the Jewish nation had a covenant with God and that the literal interpretation of the Old Testament was justifiable. Both repeatedly testified that the Jews had the right doctrine and that they only lacked the knowledge of the Son. These thoughts indeed do not attain clear expression with them because their works contain no systematic discussions involving these principles. In the second place the Church itself had become an institution where sacred ceremonial injunctions were necessary; and, in order to find a basis for these, they had to fall back on Old Testament commandments (see Vol. I., chap. 6, p. 291 ff.). In Tertullian we find this only in its most rudimentary form;[632] but in the course of the third century these needs grew mightily[633] and were satisfied. In this way the Old Testament threatened to become an authentic book of revelation to the Church, and that in a quite different and much more dangerous sense than was formerly the case with the Apostolic Fathers and the Apologists. With reference to the second point, we may remark that just when the decay of antijudaism, the polemic against Marcion, and the new needs of the ecclesiastical system threatened the Church with an estimate of the Old Testament hitherto unheard of, the latter was nevertheless thrust back by the creation and authority of the New Testament, and this consequently revived the uncertain position in which the sacred book was henceforth to remain. Here also, as in every other case, the development in the Church ends with the _complexus oppositorum_, which nowhere allows all the conclusions to be drawn, but offers the great advantage of removing every perplexity up to a certain point. The early-Catholic Fathers adopted from Justin the distinction between the Decalogue, as the moral law of nature, and the ceremonial law; whilst the oldest theologians (the Gnostics) and the New Testament suggested to them the thought of the (relative) novelty of Christianity and therefore also of the New Testament. Like Marcion they acknowledged the literal sense of the ceremonial law and God's covenant with the Jews; and they sought to sum up and harmonise all these features in the thought of an economy of salvation and of a history of salvation. This economy and history of salvation which contained the conception of a divine _accommodation and pedagogy_, and which accordingly distinguished between constituent parts of different degrees of value (in the Old Testament also), is the great result presented in the main work of Irenaeus and accepted by Tertullian. It is to exist beside the proof from prophecy without modifying it;[634] and thus appears as something intermediate between the Valentinian