23. fellow helper concerning you—Greek, "fellow worker towards you."
our brethren—the two mentioned in 2Co 8:18, 22.
messengers—rather, as the Greek, "apostles": in the less strict sense (Ac 14:14).
of the churches—sent by the churches, as we are by the Lord (Php 2:25). There was in the synagogue an ecclesiastical officer, called "the angel of the Church," whence the title seems derived (compare Re 2:1).