Tertullian

“ Chapter IV.—The Heresy Traceable to Valentinus, an Able But Restless Man. Many Schismatical Leaders of the School Mentioned. Only One of Them Shows Respect to the Man Whose Name Designates the Entire School.
We know, I say, most fully their actual origin, and we are quite aware why we call them Valentinians, although they affect to disavow their name. They have departed, it is true, [1] from their founder, yet is their origin by no means destroyed; and even if it chance to be changed, the very change bears testimony to the fact. ”

“ When they review that spiritual seed of theirs in every man after this fashion, whenever they have hit upon any novelty, they forthwith call their presumption a revelation, their own perverse ingenuity a spiritual gift ”

“ Valentinus, however, was as yet nowhere, and still the Valentinians derive their name from Valentinus. Axionicus at Antioch is the only man who at the present time does honour [5] to the memory of Valentinus, by keeping his rules [6] to the full. But this heresy is permitted to fashion itself into as many various shapes as a courtezan, who usually changes and adjusts her dress every day. ”