Who am less than the least of all saints; this the apostle speaks considering his former estate in Judaism, when he persecuted the church of Christ: so 1 Corinthians 15:9 1 Timothy 1:13,15. Thus modest is the apostle, when speaking of himself, and not of his office. The unsearchable riches of Christ; all that grace of Christ which he was to make known to the Gentiles in his preaching, wisdom, righteousness, sanctification, redemption, 1 Corinthians 1:30.
Related Commentaries of Ephesians 3:8
Ephesians 3:8
8 Unto me, who am less than the least of all saints, is this grace given, that I should preach among the Gentiles the unsearchable riches of Christ;