Tatian 
Address to the Greeks [EPUB ebook] 
and Other Fragments

It was my first intention to make this author a mere appendix to his master, Justin Martyr; for he stands in an equivocal position, as half Father and half heretic. His good seems to have been largely due to Justin’s teaching and influence. One may trust that his falling away, in the decline of life, is attributable to infirmity of mind and body; his severe asceticism countenancing this charitable thought. Many instances of human frailty, which the experience of ages has taught Christians to view with compassion rather than censure, are doubtless to be ascribed to mental aberration and decay. Early Christians had not yet been taught this lesson; for, socially, neither Judaism nor Paganism had wholly surrendered their unloving influences upon their minds. Moreover, their high valuation of discipline, as an essential condition of self-preservation amid the fires of surrounding scorn and hatred, led them to practise, perhaps too sternly, upon offenders, what they often heroically performed upon themselves, —the amputation of the scandalous hand, or the plucking out of the evil eye.
In Tatian, another Assyrian follows the Star of Bethlehem, from Euphrates and the Tigris. The scanty facts of his personal history are sufficiently detailed by the translator, in his Introductory Note. We owe to himself the pleasing story of his conversion from heathenism. But I think it important to qualify the impressions the translation may otherwise leave upon the student’s mind, by a little more sympathy with the better side of his character, and a more just statement of his great services to the infant Church.
His works, which were very numerous, have perished, in consequence of his lapse from orthodoxy. Give him due credit for his Diatessaron, of which the very name is a valuable testimony to the Four Gospels as recognised by the primitive churches. It is lost, with the “infinite number” of other books which St. Jerome attributes to him. All honour to this earliest harmonist for such a work; and let us believe, with Mill and other learned authorities, that, if Eusebius had seen the work he censures, he might have expressed himself more charitably concerning it.