Such a document as the gospel story of the Supper and its sequel is in itself the proof of the priority of the mystery-play, in some simple form, to the gospel story. In its present degree of detail the play must belong to a stage of the movement at which it had made some Gentile headway; and its reduction to writing for reading may be supposed to have taken place either at a time when the Christians by reason of persecution were prevented from carrying on their usual rituals or festivals, or, more probably, when the hierarchy decided for prudential or disciplinary reasons to abandon the regular resort to dramatic spectacle. It does not follow, of course, that none of the didactic parts of the gospel was in writing before the play was transcribed; but the fact that none of the Pauline epistles quotes any of the Jesuine teachings, and that the first Clementine epistle alludes to but one or two, is a reason for holding that they came very slowly into existence. The dramatic development would naturally occur for the most part or wholly in Gentile hands. It is not certain, indeed, that the later Jews remained uniformly averse to drama, which was partly forced on them by the Herods; and the theory of a dramatic origin for the Apocalypse is not quite untenable; but it happens that the most obviously dramatic parts of the gospel story are those which, on Gentile lines, throw the guilt of the crucifixion on the Jews. When once a gospel existed, interpolation and alteration were for some generations easy; and what happened was a multiplication of doctrines and documents at the hands of different groups or sects or leaders, the men with dogmatic or moral ideas taking this means to establish them, without regard to the coherence or consistency of the texts. Many passages are visibly inserted in order to countervail others, it being easier to add than to suppress. Only late in the second century can a canon have begun to be formed, as the Clementine epistles quote a now lost document in the nature of a gospel, and Justin's "Memoirs of the Apostles" diverge from those preserved. The later rejection by the Church of such documents proves them to have been regarded as in part heretical; and parts of the canonical gospels were altered for various dogmatic reasons after they had been made to include much of the matter in the uncanonical. The third gospel avows that "many" previous narratives existed; and apart from all these there have been preserved a number of rejected gospels, which run mainly to miraculous stories. Some of these were long abundantly popular, that of "Nicodemus" having had common vogue down to the Middle Ages. But the more thoughtful clergy would soon recognize the greater value of documents which by their teaching could impress the more educated of the laity; and the double influence of the supernaturalism and the moral appeal went to create cohesion throughout the movement.