knowing that one who is like this has been subverted, and that he offends; for he has been condemned by his own judgment
Other versions
King James Version
Knowing that he that is such is subverted, and sinneth, being condemned of himself.English Standard Version
knowing that such a person is warped and sinful; he is self-condemned.New International Version
You may be sure that such a man is warped and sinful; he is self-condemned.