Now the God of peace - God, the author or promoter of peace and union. In Romans 15:13, he is called the God of hope. Here the apostle desires that the God who gives peace would impart to them union of sentiment and feeling, particularly between the Jewish and Gentile Christians - the great object for which he labored in his journey to Judea, and which he had been endeavoring to promote throughout this Epistle; see 1-Corinthians 14:33; Hebrews 13:20.
This is the close of the doctrinal and hortatory parts of this Epistle. The remainder is made up chiefly of salutations. In the verses concluding this chapter, Paul expressed his earnest desire to visit Rome. He besought his brethren to pray that he might be delivered from the unbelievers among the Jews. His main desire was granted. He was permitted to visit Rome; yet the very thing from which he sought to be delivered, the very opposition of the Jews, made it necessary for him to appeal to Caesar, and this was the means of his accomplishing his desire. (See the closing chapters of the Acts of the Apostles.) God thus often grants our "main desire;" he hears our prayer; but he may make use of that from which we pray to be delivered as the "means" of fulfilling our own requests. The Christian prays that he may be sanctified; yet at the same time he may pray to be delivered from affliction. God will hear his main desire, to be made holy; will convert what he fears into a blessing, and make it the means of accomplishing the great end. It is right to express our "desires - all" our desires - to God; but it should be with a willingness that he should choose his own means to accomplish the object of our wishes. Provided the "God of peace" is with us, all is well.

The God of peace be with you - The whole object of the epistle is to establish peace between the believing Jews and Gentiles, and to show them their mutual obligations, and the infinite mercy of God to both; and now he concludes with praying that the God of peace - he from whom it comes, and by whom it is preserved - may be for ever with them. The word Amen, at the end, does not appear to have been written by the apostle: it is wanting in some of the most ancient MSS.
1. In the preceding chapters the apostle enjoins a very hard, but a very important and necessary, duty - that of bearing with each other, and endeavoring to think and let think, in those religious matters which are confessedly not essential to the salvation of the soul. Most of the disputes among Christians have been concerning non-essential points. Rites and ceremonies, even in the simple religion of Christ, have contributed their part in promoting those animosities by which Christians have been divided. Forms in worship and sacerdotal garments have not been without their influence in this general disturbance. Each side has been ready to take out of the 14th and 15th chapters of this epistle such expressions as seemed suitable to their own case; but few have been found who have taken up the whole. You believe that a person who holds such and such opinions is wrong: pity him and set him right, lovingly, if possible. He believes you to be wrong because you do not hold those points; he must bear with you. Both of you stand precisely on the same ground, and are mutually indebted to mutual forbearance.
2. Beware of contentions in religion, if you dispute concerning any of its doctrines, let it be to find out truth; not to support a preconceived and pre-established opinion. Avoid all polemical heat and rancour; these prove the absence of the religion of Christ. Whatever does not lead you to love God and man more, is most assuredly from beneath. The God of peace is the author of Christianity; and the Prince of peace, the priest and sacrifice of it: therefore love one another, and leave off contention before it be meddled with. On this subject the advice of the pious Mr. Herbert is good: -
Be calm in arguing; for fierceness makes
Error a fault, and truth discourtesy.
Why should I feel another man's mistakes
More than his sickness or his poverty?
In love I should; but anger is not love;
Nor wisdom neither: - therefore g-e-n-t-l-y m-o-v-e.

Now the God of peace be with you all, Amen. As God is in this chapter before styled the God of patience, Romans 15:5, and the God of hope, Romans 15:13, because of his concern in these graces; so he is here styled "the God of peace", because of his concern in that peace which is made between him and his people, by the blood of Christ. This peace was first upon his thoughts, which are therefore called thoughts of peace; a council of peace was held between him and his Son upon this head; the scheme of reconciliation was drawn by him in it; he entered into a covenant of peace with Christ, which takes its name from this momentous article of it; he appointed Christ to be the peacemaker, and laid on him the chastisement of our peace; and it pleased him by him to reconcile all things to himself, Colossians 1:20. Moreover, he is so called because he is the giver of all true solid conscience peace, the peace of God, which passeth all understanding of natural men; and which when he gives, none can give trouble; and is what he fills his people with in a way of believing, leading their faith to the blood, righteousness, and sacrifice of his Son. He is also the author of happiness and prosperity, temporal, spiritual, and eternal, and likewise of all the peace and concord which is in his churches, and among his saints; so that when the apostle wishes that the God of peace might be with them, he not only prays that the presence of God might be with them; but that they might have fresh views of their interest in peace, made by the blood of Christ; that they might enjoy peace in their own consciences, arising from thence; that they might be possessed of felicity of every kind, and that unity and harmony might subsist among them; that the peace of God might rule in their hearts, and they live in love and peace one with another, laying aside all their differences as Jews and Gentiles, about the rites and ceremonies of the law of Moses; to which the apostle may have a particular respect in this concluding wish of his, and here indeed properly the epistle ends; the following chapter being as a sort of postscript, filled up with salutations and recommendations of particular persons; wherefore the word "Amen" is placed here, though it is wanting in the Alexandrian copy.

Now the God of peace be with you all. Amen--The peace here sought is to be taken in its widest sense: the peace of reconciliation to God, first, "through the blood of the everlasting covenant" (Hebrews 13:20; 1-Thessalonians 5:23; 2-Thessalonians 3:16; Philippians 4:9); then the peace which that reconciliation diffuses among all the partakers of it (1-Corinthians 14:33; 2-Corinthians 13:11; and see on Romans 16:20); more widely still, that peace which the children of God, in beautiful imitation of their Father in Heaven, are called and privileged to diffuse far and wide through this sin-distracted and divided world (Romans 12:18; Matthew 5:9; Hebrews 12:14; James 3:18).
Note, (1) Did "the chiefest of the apostles" apologize for writing to a Christian church which he had never seen, and a church that he was persuaded was above the need of it, save to "stir up their pure minds by way of remembrance" (2-Peter 1:13; 2-Peter 3:1); and did he put even this upon the sole plea of apostolic responsibility (Romans 15:14-16)? What a contrast is thus presented to hierarchical pride, and in particular to the affected humility of the bishop of this very Rome! How close the bond which the one spirit draws between ministers and people--how wide the separation produced by the other! (2) There is in the Christian Church no real priesthood, and none but figurative sacrifices. Had it been otherwise, it is inconceivable that Romans 15:16 should have been expressed as it is. Paul's only priesthood and sacrificial offerings lay, first, in ministering to them as "the apostle of the Gentiles," not the sacrament with the "real presence" of Christ in it, or the sacrifice of the mass, but "the Gospel of God," and then, when gathered under the wing of Christ, presenting them to God as a grateful offering, "being sanctified [not by sacrificial gifts, but] by the Holy Ghost." (See Hebrews 13:9-16). (3) Though the debt we owe to those by whom we have been brought to Christ can never be discharged, we should feel it a privilege when we render them any lower benefit in return (Romans 15:26-27). (4) Formidable designs against the truth and the servants of Christ should, above all other ways of counteracting them, be met by combined prayer to Him who rules all hearts and controls all events; and the darker the cloud, the more resolutely should all to whom Christ's cause is dear "strive together in their prayers to God" for the removal of it (Romans 15:30-31). (5) Christian fellowship is so precious that the most eminent servants of Christ, amid the toils and trials of their work, find it refreshing and invigorating; and it is no good sign of any ecclesiastic, that he deems it beneath him to seek and enjoy it even amongst the humblest saints in the Church of Christ (Romans 15:24, Romans 15:32).