3:5 Which in {b} other ages was not made known unto the sons of men, as it is now revealed unto his holy apostles and prophets by the Spirit;
(b) He does not mean that no one knew of the calling of the Gentiles before, but because very few knew of it. And those that did know it, such as the prophets, had it revealed to them very obscurely, and by means of symbols.
3:5 Which. The mystery.
In other ages was not made known unto the sons of men. It was in past ages hidden from men, but now revealed by the Spirit to
apostles and prophets. Not the old Hebrew prophets, but the prophets in the church. Some of the Hebrew prophets might have had a glimpse of Gentile salvation, but they did not understand their own language as well as we do in the light of the gospel.
3:5 Which in other - In former, ages was not so clearly or fully made known to the sons of men - To any man, no, not to Ezekiel, so often styled, son of man; nor to any of the ancient prophets. Those here spoken of are New Testament prophets.
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.