That poison souls. Such are heterodox ministers, who poison people with error. The basilisk poisons herbs and flowers by breathing on them; so the breath of heretical ministers poisons souls. The Socinian, who would rob Christ of his Godhead; the Arminian, who by advancing the power of the will, would take off the crown from the head of free-grace; the Antinomian, who denies the use of the moral law to a believer, as if it were antiquated and out of date--poison men's souls. Error is as damnable as vice.The Ten Commandments, 143-144
we find Paul to be asserting four things about the false teachers: (1) they put a great deal of stock in ascetic practices, perhaps to induce visions; (2) they are so concerned with calling on angels as a means of protection from evil forces that they are virtually worshiping them; (3) they focus on visions they have experienced, perhaps citing the content of those visions in their teaching; and (4) they display, perhaps because of their boasting about visions, an arrogance that reveals a worldly orientation.The letters to the Colossians and to Philemon (p. 229). Grand Rapids, MI: William B. Eerdmans Pub. Co.
We have somehow got hold of the idea that error is only that which is outrageously wrong; and we do not seem to understand that the most dangerous person of all is the one who does not emphasize the right things.Sermon on the Mount (2:244)
The heretics were never dishonest men; they were mistaken men. They should not be thought of as men who were deliberately setting out to go wrong and to teach something that is wrong; they have been some of the most sincere men that the Church has ever known. What was the matter with them? Their trouble was this: they evolved a theory and they were rather pleased with it; then they went back with this theory to the Bible, and they seemed to find it everywhere.Studies in the Sermon on the Mount (7)