1 Corinthians 15:8-11
Paul was the last to have seen the resurrected Christ, and He was forever changed by Him. Paul considered himself unfit to be called an apostle for he was formerly an enemy of the Gospel, but by the grace of God he was saved and called to preach the Gospel to the Gentiles. From a zealous persecutor of the church to becoming a passionate proclaimer of the Gospel, he attributed all these to the abounding grace of God.