Don't argue with heretics (2()

 St John Chrysostom AD 407

He shows that they do not so much err from ignorance as they owe their ignorance to their indolence. Those who are contentious for the sake of money you will never persuade. They are only to be persuaded, so long as you keep paying out, and even so you will never satisfy their desires…. From such then, as being incorrigible, it is right to turn away.

Titus 310. A man that is divisive after the first and second admonition reject;

Ambrose of Milan

AD 397

This monster’s cavern [of heresies], your sacred 

Majesty, is thick laid (as seafaring men do say it is) 

with hidden lairs, and all the surrounding 

neighborhood, where the rocks of unbelief echo to 

the howling of her black dogs, we must pass by with 

ears stopped up. For it is written: “Hedge your ears 

about with thorns” and again: “Beware of dogs. 

Beware of evil workers”; and yet again: “One who 

is a heretic, avoid after the first reproof knowing 

that such a one is fallen and is in sin, being 

condemned of his own judgment.” So then, like 

prudent pilots, let us set the sails of our faith for the 

course wherein we may pass by most safely and 

again follow the coasts of the Scriptures