This is also the same as that Apostolic injunction, “A heretic after the first and second admonition reject, knowing that such a one is perverse.” [Tit 3:11-11] To the same end the Saviour commands evil teachers to be left to their own will, knowing that it is hardly that they can be brought to the truth.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).