What does it mean that believers are one body in Christ?
Believers of the Gospel of Grace, though many, are one body in Christ and members one of another. This Body of Christ is a Pauline term for a spiritual organism comprising all believers, regardless of location or station in life. Its members have different offices, just as body parts have distinct purposes.
Les explains that Paul is concerned with the Body of Christ, the Gospel of Grace, which goes to Gentiles, not with the Gospel of the Kingdom, which was Jewish. He calls the Body of Christ a Pauline term used exclusively, never used anywhere else in Scripture. He notes that all members do not have the same office, just as fingers do not do what toes do, and eyes do not do what ears do; every member has an intrinsic purpose. Then verse 5 says that believers of the Gospel of Grace, being many, are one body in Christ, and every one members one of another. Les illustrates this with missionaries who had believers in the jungles of Bolivia, yet those believers are in the same body as believers in Oklahoma and America. All are members of that same organism, the spiritual makeup of believers wherever they are and from whatever station in life; this is crucial to understand.
So we, being many, are one body in Christ, and every one members one of another.