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 of truth, or they occasion offenses, by which men are alienated from the love of the gospel. [1] The former evil is done when the truth of God is mixed with new dogmas devised by men; and the latter takes place, when by various arts it is made odious and contemptible. He therefore bids all, who did either of these two things, to be observed, lest they should deceive and catch the unwary; and also to be shunned, for they were injurious. Nor was it without reason that he required this attention from the faithful; for it often happens through our neglect or want of care, that such wicked men do great harm to the Church, before they are opposed; and they also creep in, with astonishing subtlety, for the purpose of doing mischief, except they be carefully watched. But observe, that he speaks of those who had been taught the pure truth of God. It is indeed an impious and sacrilegious attempt to divide those who agree in the truth of Christ: but yet it is a shameful sophistry to defend, under the pretext of peace and unity, a union in lies and impious doctrines. There is therefore no ground for the Papists to seek countenance from this passage, in order to raise ill-will against us; for we do not impugn and tear asunder the gospel of Christ, but the falsehoods of the devil, by which it has been hitherto obscured: nay, Paul clearly shows, that he did not condemn all kinds of discords, but those which destroyed consent in the orthodox faith; for the force of the passage is in the words, which ye have learnt; for it was the duty of the Romans, before they were rightly taught, to depart from the habits of their fathers and the institutions of their ancestors.

Footnotes

1 - The two words are dichostasiai and skandala, divisions and offenses, or hindrances. He had, no doubt, in view, what he noticed in chapter 14, about eating and observing of days; and according to his usual manner he mentions first the effect -- "divisions," and then the cause -- "offenses." The Gentile Christians, by eating, gave offense to the believing Jews, and this offense led to a division or separation. The evils which he had previously attempted to correct were doubtless those referred to here. "Serving their own belly," in the next verse, has in this respect an emphatic meaning. Instead of denying themselves in the use of meats for the sake of Christ, and for the peace of his Church, they preferred to gratify their own appetites. And being led away by their lust, they covered their real motive by kindly or plausibly addressing (chrestologia) and eulogizing (eulogia) those who joined them, imitating in this respect the arts of all false professors and zealots, whatever be the false principle by which they may be guided. -- Ed.

Now I beseech you - One great object of this Epistle had been to promote "peace" between the Jewish and Gentile converts. So much did this subject press upon the mind of the apostle, that he seems unwilling so leave it. He returns to it again and again; and even after the Epistle is apparently concluded, he returns to it, to give them a new charge on the subject.
Mark them - Observe attentively, cautiously, and faithfully Philippians 3:17; be on your guard against them. Ascertain "who are" the real causes of the divisions that spring up, and avoid them.
Which cause - Who make. Probably he refers here to "Jewish" teachers, or those who insisted strenuously on the observance of the rites of Moses, and who set up a claim for greater purity and orthodoxy than those possessed who received the Gentile converts as Christian brethren. The Jews were perpetually thus recalling the Christian converts to the Law of Moses; insisting on the observance of those rites; troubling the churches, and producing dissensions and strifes; Galatians 3:1; Galatians 5:1-8; Acts 15:1, Acts 15:24.
Divisions - Dissensions; parties; factions; 1-Corinthians 3:3; Galatians 5:20. The very "attempt" to form such parties was evil, no matter what the pretence. They who attempt to form parties in the churches are commonly actuated by some evil or ambitious design.
And offences - Scandals; or that give occasion for others to fall into sin. These two things are different. The first means parties; the other denotes such a course of life as would lead others into sin. The "Jew" would form parties, on the pretence of superior holiness; the Gentiles, or some hold Gentile convert might deride the scrupulous feelings of the Jew, and might thus lead him into "sin" in regard to what his conscience really forbade; see Romans 14:15. These persons on both sides were to he avoided, and they were to refuse to follow them, and to cultivate the spirit of unity and peace.
Contrary to the doctrine - To the "teaching" which you have received in this Epistle and elsewhere; the teaching that these divisions should cease; that the Jewish ceremonies are not binding; that all should lay aside their causes of former difference, and be united in one family; see Romans. 14; 15.
And avoid them - Give them no countenance or approbation. Do not follow them; compare 1-Timothy 6:3-5; 2-John 1:10; Galatians 1:8-9. That is, avoid them as "teachers;" do not follow them. It does not mean that they were to be treated harshly; but that they were to be avoided in their "instructions." They were to disregard all that they could say tending to produce alienation and strife; and resolve to cultivate the spirit of peace and union. This would be an admirable rule if always followed. Let people make "peace" their prime object; resolve to love all who "are" Christians, and it will be an infallible guage by which to measure the arguments of those who seek to promote alienations and contentions.

Mark them which cause divisions - Several MSS. read ασφαλως σκοπειτε, look sharply after them; let them have no kiss of charity nor peace, because they strive to make divisions, and thus set the flock of Christ at variance among themselves; and from these divisions, offenses (σκανδαλα, scandals) are produced; and this is contrary to that doctrine of peace, unity, and brotherly love which you have learned. Look sharply after such that they do you no evil, and avoid them - give them no countenance, and have no religious fellowship with them.

(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.

Now I beseech you, brethren,.... The apostle being about to finish his epistle, and recollecting that he had not given this church any instructions about the false teachers, who had been the cause of all their differences and uneasiness, inserts them here; or he purposely put them in this place, amidst his salutations, that they might be taken the more notice of; and very pertinently, since nothing could more express his great affection and tender concern for them; and these instructions he delivers to them, not in an authoritative way, as he might, and sometimes did, but by way of entreaty, beseeching them, and with the kind and loving appellation of brethren, the more to engage them to attend to what he was about to say to them:
them which cause divisions and offences, contrary to the doctrine which ye have learned. The men he would have taken notice of were such who divided them in their religious sentiments, introducing heterodox notions, contrary to the doctrine of the Scriptures, of Christ and his apostles, and which they had learned from them; such as justification by the works of the law, the observance of Jewish days, and abstinence from meats, enjoined by the ceremonial law, and that as necessary to salvation; to which some gave heed, and others not, and so were divided; whereas the doctrine of faith is but one, the Gospel is one uniform thing, all of a piece; and those that profess it ought to be perfectly joined together in the same mind, and in the same judgment: hence their minds were alienated from each other, and they began to despise and judge one another, yea, to go into factions and parties, being unwilling to receive and admit each other to communion; and thus by these men they were divided in sentiments, affection, and worship; and which must needs cause offence to the church and the godly members of it, as well as cause many so to be offended, as to stumble and fall from the doctrine of faith, and profession of it, and greatly stagger and distress weak believers, and bring a scandal on religion, and the name and ways of Christ among the world, as nothing does more so than the jars and discords among Christians: wherefore the apostle advises to "mark" such persons, look out for, narrowly watch, strictly observe, and diligently examine them: the metaphor is taken from watchmen, who look out from their watch tower, and observe who are coming, or pass by, and take up suspicious persons, and carefully inquire who they are, and what they are about, and whether friends or foes. So both ministers of the Gospel, and members of churches, should not be asleep, which is the opportunity false teachers take to sow the seeds of false doctrine, discord, and contention, but should watch, and be upon their guard, and look diligently, that none among them fail of, or fall from, the doctrine of grace, or any root of bitterness, error, or heresy as well as immorality, spring up, which may be troublesome, and defile others; they should observe, and take notice of such who are busy to spread false doctrine, should watch their motions, follow them closely, take them to an account, examine their principles according to the word of God; and if found to be contrary thereunto, note them as false teachers:
and avoid them; shun their ministry, drop attendance on it, depart far from them, have no private conversation with them, receive them not into their houses, nor bid them God speed; with such do not eat, have no communion with them at the Lord's table, withdraw from them as disorderly persons, who act contrary to the doctrine and order of the Gospel, and after proper admonition reject them from all fellowship with you.

How earnest, how endearing are these exhortations! Whatever differs from the sound doctrine of the Scriptures, opens a door to divisions and offences. If truth be forsaken, unity and peace will not last long. Many call Christ, Master and Lord, who are far from serving him. But they serve their carnal, sensual, worldly interests. They corrupt the head by deceiving the heart; perverting the judgments by winding themselves into the affections. We have great need to keep our hearts with all diligence. It has been the common policy of seducers to set upon those who are softened by convictions. A pliable temper is good when under good guidance, otherwise it may be easily led astray. Be so wise as not to be deceived, yet so simple as not to be deceivers. The blessing the apostle expects from God, is victory over Satan. This includes all designs and devices of Satan against souls, to defile, disturb, and destroy them; all his attempts to keep us from the peace of heaven here, and the possession of heaven hereafter. When Satan seems to prevail, and we are ready to give up all as lost, then will the God of peace interpose in our behalf. Hold out therefore, faith and patience, yet a little while. If the grace of Christ be with us, who can prevail against us?

Now I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned--"which ye learned."
and avoid them--The fomentors of "divisions" here referred to are probably those who were unfriendly to the truths taught in this epistle, while those who caused "offenses" were probably those referred to in Romans 14:15 as haughtily disregarding the prejudices of the weak. The direction as to both is, first, to "mark" such, lest the evil should be done ere it was fully discovered; and next, to "avoid" them (compare 2-Thessalonians 3:6, 2-Thessalonians 3:14), so as neither to bear any responsibility for their procedure, nor seem to give them the least countenance.

Mark them which cause divisions. Judaizing, or other false teachers, who disturbed the Gentile churches by urging them to keep the law of Moses, or by teaching some heresy. Read the Epistle to the Galatians. They were not to listen to them, and were to avoid them.
Serve not our Lord Jesus Christ. These men, like many other false teachers, were more devoted to their own appetites than to Christ.
The simple. The unsuspecting.
For your obedience is come abroad. Your reputation as good Christians is so well known that you ought not to be deceived by these false teachers.
The God of peace shall bruise Satan. Shall give you the victory.

Mark them who cause divisions - Such there were, therefore, at Rome also. Avoid them - Avoid all unnecessary intercourse with them.