(2) Now I beseech you, brethren, (f) mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them.
(2) As by describing by name those who were worthy of commendation he sufficiently declared whom they ought to hear and follow, so does he now point out to them whom they ought to take heed of, yet he does not name them, because it was not necessary.
(f) Watchfully and diligently, as though you should scout for your enemies in a watch tower.