He has left a mark on the text of Scripture of which traces are distinctly recognizable at the present day[457].

A great deal more is known about him than about any other individual of his school.

Justin Martyr and Irenaeus wrote against him: besides Origen and Clement of Alexandria, Tertullian in the West[458], and Epiphanius in the East, elaborately refuted his teaching, and give us large information as to his method of handling Scripture.
Another writer of this remote time who, as I am prone to think, must have exercised sensible influence on the text of Scripture was Ammonius of Alexandria.
But Tatian beyond every other early writer of antiquity [appears to me to have caused alterations in the Sacred Text.] It is obviously no answer to anything that has gone before to insist that the Evangelium of Marcion (for instance), so far as it is recognizable by the notices of it given by Epiphanius, can very rarely indeed be shewn to have resembled any extant MS.

of the Gospels.

Let it be even freely granted that many of the charges brought against it by Epiphanius with so much warmth, collapse when closely examined and severely sifted.