Note 516 — Chapter IX · PROBLEMS OF THE ARABIAN CULTURE (C) PYTHAGORAS, MOHAMMED, CROMWELL
Charles Francis Atkinson translation
And, as the secession of a reformed Church necessarily transforms the parent Church, there was a Magian counter-reformation also. In the Decretum Gelasii (c. 500, Rome) even Clement of Alexandria, Tertullian, and Lactantius, and in the Synod of Byzantium (543) Origen, were declared heretical.