1 Corinthians 1:1

Paul, called to be an apostle of Jesus Christ through the will of God, and Sosthenes our brother [Paul does not here call himself the slave of Christ as he afterwards did when he wrote to the Romans, for he now needed to assert the divinity of his apostleship because certain Judaizers had affirmed in Corinth that he was not divinely called, as were the twelve. See 1 Corinthians 9:1; 2 Corinthians 12:12. His apostleship was not the result of his own choice, nor yet the choice of any church, but of the will of God. Who Sosthenes was is not known. It is not unlikely that he was Paul's amanuensis, as was Tertius (Romans 16:22). The speed with which the apostle uses the pronoun "I" (1 Corinthians 1:4) shows how little Sosthenes had to do with the Epistle. It is highly improbable that he is the same man mentioned at Acts 18:17],