They went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us: but they went out, that they might be made manifest that they were not all of us.
Ver. 19. But they were not of us] No more were our Anti-trinitarians, Arians, Anti-scripturists, ever of our Church, otherwise than as wens and botches, whatever our adversaries aver and cavil. So of old, because the Waldenses and Manichees lived in the same places, and were both held heretics, the Papists maliciously gave out that the Waldenses (those ancient Protestants) were defiled with the errors of the Manichees and Catharists, which yet they ever abhorred.