Romans 12:4 - Matthew Poole's English Annotations on the Holy Bible

Ver. 4,5. These verses are a reason against arrogancy. All Christians are members of one and the same body; therefore, they should not pride themselves in their gifts, but employ them for the common good. It is with the church, the mystical body of Christ, as with a natural body that hath many members, and all these have not the same office, or the same action or operation (as the word signifieth); the eye hath one office, the ear another, the hand a third, &c. So the church of Christ, though one body in him who is the Head, hath many members; many in regard of their persons, and many in regard of their offices, which are various and diverse; and which is more, the members are every one members one of another; i.e. they are joint and fellow members; as they have a common relation to the same Head, so a mutual relation to one another. Therefore Christians, especially church officers. should not contemn one another, or intrude upon the office of each other; but all should use their gifts to the good and edification of others.