Schaff, Philip. History of the Christian Church (The Complete Eight Volumes in One). Amazon Kindle Edition, 2014.
Volume 2, Ante-Nicene Christianity A.D. 100-325, “Chapter 11. The Heresies of the Ante-Nicene Age” Sections 112-136, Loc. 17655-18757.
§ 123. Cerinthus.
Cerinthus, an early Gnostic, “appeared towards the close of the first century in Asia Minor, and came in conflict with the aged Apostle John” (Schaff 2014, Loc. 18173). Schaff observes the great concern the orthodox had about gnostic techings, as John made every effort to avoid Cerinthus for fear of God’s judgment. According to Epiphanius, Cerinthus was an Egyptian who studied in Alexandria. He was likely one of the people who opposed Paul in Galatians 2:4 and 2 Corinthians 11:13. He rejected the New Testament and taught the Mosaic Law (Schaff 2014, Loc. 18182). As a Gnostic, he took the God of Israel to be separate from the maker of the world. He also separated Jesus from the Christ, denying the deity and humanity of God the Son (Schaff 2014, Loc. 18190). Some have assigned the fourth Gospel and Revelation to Cerinthus rather than John (Schaff 2014, Loc. 18197). Schaff sees Cerinthus as the last of the proto-Gnostics of the first century.