Now I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them.
Ver. 17. Mark them which] Set a watchful and a jealous eye upon them, as upon pests and enemies. And here, let not our episcopi (whose office it is chiefly) be aposcopi, overseers, be byseers, but look well to the flock, lest these wolves worry them, Acts 20:29 .
And avoid them] Gr. εκκλινατε. Decline them studiously, as ye would do a serpent in your way, or poison in your food.