What does “in one body ” mean in Colossians 3:15?

What does “in one body ” mean in Colossians 3:15?

Colossians 3:15 "And let the peace of God rule in your hearts, to the which also ye are called in one body; and be ye thankful." (KJV)

I have found that "in one body" according to

    Meyer's NT Commentary

    means this: ἐν ἑνὶ σώματι] not instead of εἰς ἓν σῶμα (Grotius, Flatt, and many others); nor yet: “as growing to be members of a single body” (Hofmann, gratuitously importing), but (comp. Ellicott and Bleek) as the result of ἐκλήθητε, announcing the relation of fellowship, into which the individuals are translated through their calling, and in which they now find themselves continuously. This abiding condition was the predominant conception; hence the pregnancy of the expression (Kühner, II. 1, p. 469); so that ye are in one body, namely, as its members. The element of unity, added with emphasis, and that quite in Pauline form (Romans 12:5; 1 Corinthians 10:17; in opposition to Holtzmann), stands in appropriate reference to the entire requirement. To have become by the calling one body with those who share in that calling, and yet not to let the holy moral disposition, for the sake of which we are called, be the common ruling power of life—what a contradiction! In that case there would be wanting to the ἓν σῶμα the ἓν πνεῦμα accordant with the calling (Ephesians 4:4; 1 Corinthians 12:13).

And according to the

    Expositor's Greek Testament it means this: ἐν ἑνὶ σώματι: “so that ye are in one body,” result rather than aim being expressed. Disunion in the body is incompatible with the peace of individual members.—καὶ εὐχάριστοι γίνεσθε: “and become thankful,” i.e., to God for calling you, or more probably for the peace in your hearts, which is the main thought. εὐχ. might mean “gracious” (a rare sense), but this would not be weighty enough to end these exhortations.

But I still don't understand it, even though I looked up all the references that Meyers listed.

Clarify • Share • Report • Asked November 22 2018 • Jack Gutknecht