For I am the least of the apostles, who am not fit to be called an apostle, because I persecuted the church of God.
All Commentaries on 1 Corinthians 15:9 Go To 1 Corinthians 15
John Chrysostom
AD 407
Paul says this because he was a humble man and also because it is what he really thought about himself. He was forgiven for having persecuted the church, but it was a shame he never forgot. It taught him the greatness of God’s grace toward him.