After quoting this passage, and that from Epiphanius, Canon Westcott says with an assurance which, considering the nature of the evidence, is singular:--"Not only then was the Diatessaron grounded on the four canonical Gospels, but in its general form it was so orthodox as to enjoy a wide ecclesiastical popularity. The heretical character of the book was not evident upon the surface of it, and consisted rather in faults of defect than in erroneous teaching. Theodoret had certainly examined it, and he, like earlier writers, regarded it as a compilation from the four Gospels. He speaks of omissions which were at least in part natural in a Harmony, but notices no such apocryphal additions as would have found place in any Gospel not derived from canonical sources."(2) Now it must be remembered that the evidence regarding Tatian's Gospel is of the very vaguest description. It is not mentioned by any writer until a century and a half after the date of its supposed
2 On the Canon, p. 281. [In the 4th edition, the first sentence in the above passage is altered to: "From this statement it is clear that the Diatessaron was so orthodox as to enjoy a wide ecclesiastical popularity." P. 320.]
composition, and then only referred to by Eusebius, who had not seen the work, and candidly confesses his ignorance with regard to it, so that a critic who is almost as orthodox as Canon Westcott himself acknowledges: "For the truth is that we know no more about Tatian's work than what Eusebius, who never saw it, knew."(1) The only other writer who refers to it, Epiphanius, had not seen it either, and while showing that the title of Diatessaron had not been given to it by Tatian himself, he states the important fact that some called it the Gospel according to the Hebrews. Theodoret, the last writer who mentions it, and of whom Dr. Donaldson also says: "Theodoret's information cannot be depended upon,"(2) not only does not say that it is based upon our four Gospels, but, on the contrary, points out that Tatian's Gospel did not contain the genealogies and passages tracing the descent of Jesus through the race of David, which our Synoptics possess, and he so much condemned the mischievous design of the work that he confiscated the copies in circulation in his diocese as heretical. Canon Westcott's assertion that Theodoret regarded it as a compilation of our four Gospels is most arbitrary. Omissions, as he himself points out, are natural to a Harmony, and conciseness certainly would be the last quality for which it could have been so highly prized, if every part of the four Gospels had been retained. The omission of the parts referred to, which are equally omitted from the canonical fourth Gospel, could not have been sufficient to merit the condemnation of the work as heretical, and had Tatian's Gospel not been different in various respects from our four Gospels, such summary treatment would have been totally