Paul, (1) called [to be] an (2) apostle of Jesus Christ through the will of God, and (3) Sosthenes [our] brother,
(1) The inscription of the epistle, in which he mainly tries to procure the good will of the Corinthians towards him, yet nonetheless in such a way that he always lets them know that he is the servant of God and not of men. (2) If he is an apostle, then he must be heard, even though he sometimes sharply reprehends them, seeing he has not his own cause in hand, but is a messenger that brings the commandments of Christ. (3) He has Sosthenes with himself, that this doctrine might be confirmed by two witnesses.