I appeal to you, brothers, to watch out for those who cause divisions and create obstacles contrary to the doctrine that you have been taught; avoid them.
17. And I beseech you, etc. He now adds an exhortation, by which all Churches have often need of being stirred up; for the ministers of Satan are ever ready to take occasion to disturb the kingdom of Christ: and they attempt to make disturbances in two ways; for they either sow discord, by which the minds of men are drawn away from the unity...
The apostle having endeavoured by his endearing salutations to unite them together, it was not improper to subjoin a caution to take heed of those whose principles and practices were destructive to Christian love. And we may observe, I. The caution itself, which is given in the most obliging manner that could be: I beseech you, brethren.
Commenting on Romans 16:17-20
For they that are such serve not our Lord Jesus Christ,.... They do not preach him, but themselves; they do not seek the things of Christ, his honour and glory, the spread of his Gospel, and the enlargement of his kingdom and interest; they seek their own things, worldly honour and applause, riches, wealth, and grandeur; they seek to please men, and so are not...