"Elain Pagels stresses that the Gnostic writers 'did not regard themselves as "heretics"'. Of course note. But the issue of heresy is hardly a matter of self-designation. Let us assume that these writers (including forgers) sincerely believed that they possessed the truth and that the conventional Christians had it all wrong, while the conventional Christians were equally sure that theirs was the true Christianity. Within the confines of faith, the charge of heresy can be resolved objectively only on the basis of which side more accurately transmitted the original teachings of Jesus. That decision must come down to sources (p. 152)."
"Had the Gnostics prevailed, they presumably would be viewed today rather more in the manner that Pagels and other 'Ivy League' Gnostics would wish, assuming that such a thing as Christianity still existed. But the Gnostics did not prevail, because they did not present nearly so plausible a faith, nor did they seem to understand how to create sturdy organizations. Instead, most of them did and taught their own 'thing'. To sum up, the Gnostics gospels were rejected for good reason: they constitute idiosyncratic, often lurid personal visions reported by scholarly mystics, ambitious pretenders, and various outsiders who found their life's calling in dissent. Whatever else might be said about them, surely they were heretics. As N.T. Wright put it, they 'represent ... a form of spirituality which, while still claiming the name of Jesus, has left behind them every things that made Jesus who he was, and that made the early Christians what they were' (p. 154)."