Endeavoring to keep the unity of the Spirit. With good reason does he recommend forbearance, as tending to promote the unity of the Spirit. Innumerable offenses arise daily, which might produce quarrels, particularly when we consider the extreme bitterness of man's natural temper. Some consider the unity of the Spirit to mean that spiritual unity which is produced in us by the Spirit of God. There can be no doubt that He alone makes us "of one accord, of one mind," (Philippians 2:2,) and thus makes us one; but I think it more natural to understand the words as denoting harmony of views. This unity, he tells us, is maintained by the bond of peace; for disputes frequently give rise to hatred and resentment. We must live at peace, if we would wish that brotherly kindness should be permanent amongst us.

The unity of the Spirit - A united spirit, or oneness of spirit. This does not refer to the fact that there is one Holy Spirit; but it refers to unity of affection, of confidence, of love. It means that Christians should be united in temper and affection, and not be split up into factions and parties. It may be implied here, as is undoubtedly true, that such a unity would be produced only by the Holy Spirit; and that, as there was but one Spirit which had acted on their hearts to renew them, they ought to evince the same feelings and views. There was occasion among the Ephesians for this exhortation; for they were composed of Jews and Gentiles, and there might be danger of divisions and strifes, as there had been in other churches. There is "always" occasion for such an exhortation; for:
(1) "unity" of feeling is eminently desirable to honor the gospel (see the notes on John 17:21); and,
(2) there is always danger of discord where people are brought together in one society. There are so many different tastes and habits; there is such a variety of intellect and feeling; the modes of education have been so various, and the temperament may be so different, that there is constant danger of division. Hence, the subject is so often dwelt on in the Scriptures (see the notes on 1 Cor. 2ff), and hence, there is so much need of caution and of care in the churches.
In the bond of peace - This was to be by the cultivation of that peaceful temper which binds all together. The American Indians usually spoke of peace as a "chain of friendship" which was to be kept bright, The meaning here is, that they should be bound or united together in the sentiments and affections of peace. It is not mere "external" unity; it is not a mere unity of creed; it is not a mere unity in the forms of public worship; it is such as the Holy Spirit produces in the hearts of Christians, when it fills them all with the same love, and joy, and peace in believing. The following verses contain the reasons for this.

Endeavouring to keep the unity of the Spirit in the bond of peace - There can be no doubt that the Church at Ephesus was composed partly of converted Jews, as well as Gentiles. Now, from the different manner in which they had been brought up, there might be frequent causes of altercation. Indeed, the Jews, though converted, might be envious that the Gentiles were admitted to the same glorious privileges with themselves, without being initiated into them by bearing the yoke and burden of the Mosaic law. The apostle guards them against this, and shows them that they should intensely labor (for so the word σπουδαζειν implies) to promote and preserve peace and unity. By the unity of the Spirit we are to understand, not only a spiritual unity, but also a unity of sentiments, desires, and affections, such as is worthy of and springs from the Spirit of God. By the bond of peace we are to understand a peace or union, where the interests of all parties are concentrated, cemented, and sealed; the Spirit of God being the seal upon this knot.

(3) Endeavouring to keep the unity of the Spirit in the bond of peace.
(3) Thirdly he requires perfect agreement, but yet such that is joined with the band of the Holy Spirit.

Endeavouring to keep the unity of the Spirit,.... That is, a spiritual union: there is an union between God and his people, and between Christ and his members, and between saints and saints, and the bond of each union is love; and that it is which knits and cements them together; and it is the last of these which is here intended: the saints are united under one head, and are members of one and the same body, and should be of the same mind and judgment, and of one accord, heart, and affection: and this may be called "the unity of the Spirit"; because it is an union of spirits, of the spirits or souls of men; and that in spiritual affairs, in the spiritual exercises of religion; and it is effected by the Spirit of God, by whom they are baptized into one body. Now to endeavour or study to keep and preserve this, supposes that this union does already exist; that it is very valuable, as making much for the glory of God, the mutual comfort and delight of saints, and is worth taking some pains about; and that it is very difficult to secure, there being so many things which frequently arise, and break in upon it, through the devices of Satan, and the corruptions of men's hearts: but though it is difficult, and may sometimes seem to be impossible, yet it becomes the saints to be diligent in the use of means to keep it up, and continue it; and which they may be said to endeavour after, when they abide with one another, and do not forsake each other upon every occasion; when they perform all offices of love to one another, and stir up each other to the like: and the way and manner in which this is to be kept, is
in the bond of peace: the Arabic version reads, "by the bond of love and peace": by maintaining peace among themselves, and seeking those things which tend to, and make for peace, and spiritual edification; and which is called a bond, in allusion to the Greek word used, which comes from one that signifies to knit, join, and bind together, and because it is of a knitting and uniting nature. Now so to act is to walk worthy of calling grace, or agreeably to it: peace is what the saints are called unto in the effectual calling: and what is suitable to God, who is the God of peace; and to Christ, who is the Prince of peace; and to the Holy Spirit, whose fruit is peace; and to the Gospel, which is the Gospel of peace; and to the character which the saints bear, which is that of sons of peace.

Endeavouring to keep the unity of the Spirit - That mutual union and harmony, which is a fruit of the Spirit. The bond of peace is love.