From the Pulpit...

Paul was confident about the Corinthian’s recommendation-letter-status because Jesus Christ gave him that confidence. And he had good reason: he gave them the genuine gospel message, the church was started, and he could see God was doing a work there. So he continued in faith with confidence that the work of the gospel was having an impact. The source of his ministry sufficiency was God, who gave him authority to preach the gospel and enabled him to be effective in that ministry. This is all the more remarkable to Paul because of the nature of his message, a message that is connected to the new covenant.