1 Corinthians 15:9

The least. He had been last of all (v. 8), now he claims to be least (cf. on Eph. 3:8).

Not meet. That is, not fit, not worthy, insufficiently qualified. Paul recognizes the truth that no man, of himself, is in any sense worthy of being called to the service of God (see on 2 Cor. 3:5).

Because I persecuted. It appears that he never forgave himself his former fierce opposition to the Christian believers, and the memory of that experience tended to keep him humble and continually grateful for the goodness of the Lord (see Acts 22:4; 26:9-11; Gal. 1:13; 1 Tim. 1:13). In the truly converted heart, God’s forgiveness produces an awareness of sin as well as feelings of gratitude and humility. Such an experience equips a man for witnessing to others.