They seduce them, and carry them out of the right way into by-paths and blind thickets of error, blasphemy, and wickedness, where they are lost forever. Now, the best way to deliver poor souls from being deluded and destroyed by these messengers of Satan is, to discover them in their colors, that so, being known, poor souls may shun them, and fly from them as from hell itself.
False teachers are soul-undoers.
They are like evil chirurgeons, that skin over the wound, but never heal it. Flattery undid Ahab and Herod, Nero and Alexander. False teachers are hell's greatest enrichers. Non acerba, sed blanda, Not bitter, but flattering words do all the mischief, said Valerian, the Roman emperor. And the same hard measure had our Lord Jesus from the Scribes and Pharisees, who laboured as for life to build their own credit upon the ruins of his reputation.