Valentinus had expected to become a bishop, because he was an able man both in genius and eloquence. Being indignant, however, that another obtained the dignity by reason of a claim which confessorship had given him, he broke with the church of the true faith. Just like those (restless) spirits which, when roused by ambition, are usually inflamed with the desire of revenge, he applied himself with all his might to exterminate the truth; and finding the clue of a certain old opinion, he marked out a path for himself with the subtlety of a serpent. Ptolemæus afterwards entered on the same path, by distinguishing the names and the numbers of the Ænons into personal substances, which, however, he kept apart from God. Valentinus had included these in the very essence of the Deity, as senses and affections of motion. Sundry bypaths were then struck off therefrom, by Heraclean and Secundus and the magician Marcus. Theotimus worked hard about “the images of the law.” 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 to the memory of Valentinus, by keeping his rules 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. And why not? 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; but (they deny all) unity, admitting only diversity.
Tertullian
Against the Valentinians
Chapter IV