Of which I was made a minister. Having declared the gospel to be the instrument employed in communicating grace to the Gentiles, he now adds, that he was made a minister of the Gospel; and thus applies to himself the general statements which had been made. But, to avoid claiming for himself more than is proper, he affirms that it is the gift of the grace of God, and that this gift was an exhibition of divine power. As if he had said, "Inquire not what I have deserved; for in the free exercise of kindness, the Lord made me an apostle of the Gentiles, not for any excellence of mine, but by his own grace. Inquire not what I formerly was; for it is the Lord's prerogative to exalt them of low degree.'" (Luke 1:52.) To produce something great out of nothing, shews the effectual working of his power.

Whereof I was made a minister - see the notes at Ephesians 3:2.
According to the gift of the grace of God - It was not by my own seeking or merit; it was a free gift.
Of the grace of God - The sentiment is, that throughout it was a mere matter of grace that he was called into the ministry, and that so important an office was entrusted to him as that of bearing the gospel to the Gentiles.
By the effectual working of his power - Not by any native inclination which I had to the gospel, and not by any power which I have put forth. It is by "the energy of his power;" compare notes, Galatians 2:8. Locke understands this of the energy or power which God put forth in converting the Gentiles under his ministry. But it seems to me that it refers rather to the power which God put forth in the conversion of Paul himself, and putting him into the ministry. This is clear from the following verse. The meaning is, that such was his opposition to the gospel by nature, that nothing but the "energy of God" could overcome it, and that his conversion was to be traced to that alone.

Whereof I was made a minister - Διακονος· A deacon, a servant acting under and by the direction of the great Master, Jesus Christ; from whom, by an especial call and revelation, I received the apostolic gifts and office, and by την ενεργειαν της δυναμεως αυτου, the energy, the in-working of his power, this Gospel which I preached was made effectual to the salvation of vast multitudes of Jews and Gentiles.

Whereof I was made a minister,.... That is, of the Gospel, not by men, but by God: and he is a true minister of the Gospel who is called of God to the work of the ministry, and is qualified by him with grace and gifts for it; and who faithfully discharges it according to the ability God has given; and such an one was the apostle:
according to the gift of the grace of God given unto me; not according to his natural capacity, his liberal education, or acquired learning; but according to a gift, a ministerial gift bestowed upon him, for such service: for this gift of grace does not design the grace of God wrought in his soul; nor the doctrines of grace, the subject of the Gospel ministry; nor the efficacious grace of God, which makes that successful and useful to the souls of men; but a gift of interpreting the Scriptures, and of explaining the truths of the Gospel to the edification of men; and which is a distinct thing from natural abilities, human learning, or internal grace; for there may be all these, and yet a man not fit to be a minister of the Gospel; what qualifies men for that is the above gift, which God, of his sovereign good will and pleasure, gives to some of the sons of men:
by the effectual working of his power; the power of God is seen in working grace in the hearts of men, thereby making them believers in Christ; and it is also displayed in the gifts of the Spirit bestowed on men, which is called a being endued with a power from on high; thereby making men, and not angels, and these oftentimes the meanest and weakest, ministers of Christ; and likewise in assisting them in their work, and in carrying them through it, and in making them successful in it, to the conversion of sinners, and the edification of saints.

Whereof--"of which" Gospel.
according to--in consequence of, and in accordance with, "the gift of the grace of God."
given--"which (gift of grace) was given to me by (Greek, 'according to,' as in Ephesians 3:20; Ephesians 1:19 : as the result of, and in proportion to) the effectual working (Greek, 'energy,' or 'in-working') of His power."

According to the gift of the grace of God - That is, the apostle - ship which he hath graciously given me, and which he hath qualified me for. By the effectual working of his power - In me and by me.