Many offshoots of numerous heresies have already been formed from those heretics we have described. This arises from the fact that numbers of them—indeed, we may say all—desire themselves to be teachers, and to break off from the particular heresy in which they have been involved. Forming one set of doctrines out of a totally different system of opinions, and then again others from others, they insist upon teaching something new, declaring themselves the inventors of any sort of opinion which they may have been able to call into existence.
Irenaeus of Lyons
Against Heresies Book I
Chapter XXVIII