31 For this reason I, Paul, a prisoner for Christ Jesus on behalf of you Gentiles-- 2 assuming that you have heard of the stewardship of God's grace that was given to me for you, 3 how the mystery was made known to me by revelation, as I have written briefly. 4 When you read this, you can perceive my insight into the mystery of Christ, 5 which was not made known to the sons of men in other generations as it has now been revealed to his holy apostles and prophets by the Spirit. 6 This mystery is[1] that the Gentiles are fellow heirs, members of the same body, and partakers of the promise in Christ Jesus through the gospel. 7 Of this gospel I was made a minister according to the gift of God's grace, which was given me by the working of his power. 8 To me, though I am the very least of all the saints, this grace was given, to preach to the Gentiles the unsearchable riches of Christ, 9 and to bring to light for everyone what is the plan of the mystery hidden for ages in[2] God who created all things, 10 so that through the church the manifold wisdom of God might now be made known to the rulers and authorities in the heavenly places.
Matthew Henry's Commentary on Ephesians 3:1-10
Commentary on Ephesians 3:1-7
(Read Ephesians 3:1-7)
For having preached the doctrine of truth, the apostle was a prisoner, but a prisoner of Jesus Christ; the object of special protection and care, while thus suffering for him. All the gracious offers of the gospel, and the joyful tidings it contains, come from the rich grace of God; it is the great means by which the Spirit works grace in the souls of men. The mystery, is that secret, hidden purpose of salvation through Christ. This was not so fully and clearly shown in the ages before Christ, as unto the prophets of the New Testament. This was the great truth made known to the apostle, that God would call the Gentiles to salvation by faith in Christ. An effectual working of Divine power attends the gifts of Divine grace. As God appointed Paul to the office, so he qualified him for it.
Commentary on Ephesians 3:8-12
(Read Ephesians 3:8-12)
Those whom God advances to honourable employments, he makes low in their own eyes; and where God gives grace to be humble, there he gives all other needful grace. How highly he speaks of Jesus Christ; the unsearchable riches of Christ! Though many are not enriched with these riches; yet how great a favour to have them preached among us, and to have an offer of them! And if we are not enriched with them it is our own fault. The first creation, when God made all things out of nothing, and the new creation, whereby sinners are made new creatures by converting grace, are of God by Jesus Christ. His riches are as unsearchable and as sure as ever, yet while angels adore the wisdom of God in the redemption of his church, the ignorance of self-wise and carnal men deems the whole to be foolishness.