that the Son of God really appeared in the flesh. But that was not everywhere sufficient, for, even admitting that about the period between 150 and 180 A.D. all the Churches had a fixed creed which they regarded as apostolic in the strict sense—and this cannot be proved,—the most dangerous of all Gnostic schools, viz., those of Valentinus, could recognise this creed, since they already possessed the art of explaining a given text in whatever way they chose. What was needed was an apostolic creed