The Fathers of the Second Council of Constantinople, that is.
“As we said earlier, I repeat once more: If anyone preaches to you a gospel contrary to what you have received, let him be accursed. Since the Lord declares that the person is judged already, and the Apostle curses even the angels if they instruct in anything different from what we have preached, how is it possible even for the most presumptuous to assert that these condemnations apply only to those who are still alive? Are they unaware, or rather pretending to be unaware, that to be judged anathematized is just the same as to be separated from God?
“The heretic, even though he has not been condemned formally by any individual, in reality brings anathema on himself, having cut himself off from the way of truth by his heresy. What reply can such people make to the Apostle when he writes: ‘As for someone who is factious, after admonishing him once or twice, have nothing more to do with him, knowing that such a person is perverted and sinful; he is self-condemned.’
“It was in the spirit of this text that Cyril of holy memory, in the books which he wrote against Theodore, declared as follows: ‘Whether or not they are alive, we ought to keep clear of those who are in the grip of such dreadful errors. It is necessary always to avoid what is harmful, and not to be worried about public opinion but rather to consider what is pleasing to God’.”
What a bunch of blowhards, eh?