It is quite likely, as Salmon suggests (in the Dict. of Christ. Biog.), that Dionysius, who wrote against Marcion in this epistle to the Nicomedians, also had Marcionism in view in writing on life and discipline to the churches of Pontus and Crete. It was probably in consequence of reaction against their strict discipline that he advocated the readmission to the Church of excommunicated offenders, in this anticipating the later practice of the Roman church, which was introduced by Callixtus and soon afterward became general, though not without bitter opposition from many quarters. Harnack (Dogmengeschichte, p. 332, note 4) throws doubt upon the correctness of this report of Eusebius; but such doubt is unwarranted, for Eusebius had Dionysius’ epistle before him, and the position which he represents him as taking is quite in accord with the mildness which he recommends to Pinytus, and is therefore just what we should expect. The fact that Callixtus’ principle is looked upon by Tertullian and Hippolytus as an innovation does not militate at all against the possibility that Dionysius in Corinth, or other individuals in other minor churches, held the same principles some time before.