Cyprian

From such men come those who, without divine appointment, set themselves over their rash associates, make themselves prelates without any lawful ordination and call themselves bishops though no one gives them a bishopric. The Holy Spirit portrays them in the Psalms "sitting in the seat of pestilence," plagues and blights to faith, snake-mouthed traitors, scheming to pervert truth, spewing deadly poisons from their pestiferous tongues. Their words "spread like a canker." Their teaching pours fatal venom into men's hearts and breasts.