If it be possible - If it can be done. This expression implies that it could not always be done. Still it should be an object of desire; and we should endeavor to obtain it.

As much as lieth in you - This implies two things:

(1) We are to do our utmost endeavors to preserve peace, and to appease the anger and malice of others.

(2) we are not to "begin" or to "originate" a quarrel.

So far as "we" are concerned, we are to seek peace. But then it does not always depend on us. Others may oppose and persecute us; they will hate religion, and may slander, revile, and otherwise injure us; or they may commence an assault on our persons or property. For "their" assaults we are not answerable; but we are answerable for our conduct toward them; and on no occasion are we to commence a warfare with them. It may not be "possible" to prevent their injuring and opposing us; but it is possible not to begin a contention with them; and "when they" have commenced a strife, to seek peace, and to evince a Christian spirit. This command doubtless extends to everything connected with strife; and means that we are not to "provoke" them to controversy, or to prolong it when it is commenced; see Psalm 34:14; Matthew 5:9, Matthew 5:39-41; Hebrews 12:14. If all Christians would follow this command, if they would never "provoke" to controversy, if they would injure no man by slander or by unfair dealing, if they would compel none to prosecute them in law by lack of punctuality in payment of debts or honesty in business, if they would do nothing to irritate, or to prolong a controversy when it is commenced, it would put an end to no small part of the strife that exists in the world.

If it be possible - To live in a state of peace with one's neighbors, friends, and even family, is often very difficult. But the man who loves God must labor after this, for it is indispensably necessary even for his own sake. A man cannot have broils and misunderstandings with others, without having his own peace very materially disturbed: he must, to be happy, be at peace with all men, whether they will be at peace with him or not. The apostle knew that it would be difficult to get into and maintain such a state of peace, and this his own words amply prove: And if it be possible, as much as lieth in you, live peaceably. Though it be but barely possible, labor after it.

If it be possible, as much as lieth in you, live peaceably,.... Or be at peace, seek after peace, pursue it, and cultivate it:

with all men; with those that we are immediately concerned with, in a natural relation; so husbands should live peaceably with their wives, and wives with their husbands; parents with their children, and children with their parents; masters with their servants, and servants with their masters; and one brother, relation, and friend, with another: and so with all we are concerned with in a spiritual relation, as members of Christ, and in the same church state; such should be at peace among themselves, 1 Thessalonians 5:13; peace should rule in their hearts, Colossians 3:15, and they should study to keep "the unity of the Spirit, in the bond of peace", Ephesians 4:3, yea, with all we are concerned in a civil sense; saints should live peaceably in the neighbourhood, towns, cities, and countries, where they dwell, and show themselves to be the quiet in the land; should pray for the peace of the place where they are; and do all that in them lies to promote it, by living themselves peaceably and quietly, in all godliness and honesty; yea, they should live peaceably with their very enemies, "if it be possible"; which is rightly put, for there are some persons of such tempers and dispositions, that it is impossible to live peaceably with; for when others are for peace, they are for war; and in some cases it is not only impracticable, but would be unlawful; as when it cannot be done consistent with holiness of life and conversation, with the edification of others, the truths of the Gospel, the interest of religion, and the glory of God; these are things that are never to be sacrificed for the sake of peace with men: the apostle adds another limitation of this rule, "as much as lieth in you"; for more than this is not required of us; nothing should be wanting on our parts; every step should be taken to cultivate and maintain peace; the blame should lie wholly on the other side; it becomes the saints to live peaceably themselves, if others will not with them.

If it be possible

Not if you can, but if others will allow. The phrase is explained by as much as lieth in you (τὸ ἐξ ὑμῶν), lit., as to that which proceeds from you, or depends on you. "All your part is to be peace" (Alford).

If it be possible, as much as lieth in you, live peaceably with all men.

12:18 If it be porssible,... live peaceably with all men. If you can do so. Sometimes it is impossible. Sometimes sinners are exceedingly mad against the saints. But we are to be peacemakers (Mt 5:9).

18. If it be possible-that is, If others will let you.

as much as lieth in you-or, "dependeth on you."

live peaceably-or, "be at peace."

with all men-The impossibility of this in some cases is hinted at, to keep up the hearts of those who, having done their best unsuccessfully to live in peace, might be tempted to think the failure was necessarily owing to themselves. But how emphatically expressed is the injunction to let nothing on our part prevent it! Would that Christians were guiltless in this respect!

12:17-21 Since men became enemies to God, they have been very ready to be enemies one to another. And those that embrace religion, must expect to meet with enemies in a world whose smiles seldom agree with Christ's. Recompense to no man evil for evil. That is a brutish recompence, befitting only animals, which are not conscious of any being above them, or of any existence hereafter. And not only do, but study and take care to do, that which is amiable and creditable, and recommends religion to all with whom you converse. Study the things that make for peace; if it be possible, without offending God and wounding conscience. Avenge not yourselves. This is a hard lesson to corrupt nature, therefore a remedy against it is added. Give place unto wrath. When a man's passion is up, and the stream is strong, let it pass off; lest it be made to rage the more against us. The line of our duty is clearly marked out, and if our enemies are not melted by persevering kindness, we are not to seek vengeance; they will be consumed by the fiery wrath of that God to whom vengeance belongeth. The last verse suggests what is not easily understood by the world; that in all strife and contention, those that revenge are conquered, and those that forgive are conquerors. Be not overcome of evil. Learn to defeat ill designs against you, either to change them, or to preserve your own peace. He that has this rule over his spirit, is better than the mighty. God's children may be asked whether it is not more sweet unto them than all earthly good, that God so enables them by his Spirit, thus to feel and act.