Ephesians 4:3

“Endeavouring to keep the unity of the Spirit, &c.] 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…”

“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…”

“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. Ephesians 4:4”

“4:3 binding yourselves together with peace: Paul’s emphasis on God’s acceptance of Gentiles as well as Jews (2:11–3:6) is now applied ethically: Jews and Gentiles are to accept one another in the church (see Col 3:14-15).”

“Eph 4:4; Joh 13:34, Joh 17:21-23; Rom 14:17-19; Co1 1:10, Co1 12:12, Co1 12:13; Co2 13:11; Col 3:13-15; Th1 5:13; Heb 12:14; Jam 3:17, Jam 3:18 Ephesians 4:4”