Verse 1-6 — There can be no doubt the apostle speaks of himself. Whether heavenly things were brought down to him, while his body was in a trance, as in the case of ancient prophets; or whether his soul was dislodged from the body for a time, and taken up into heaven, or whether he was taken up, body and soul together, he knew not. We are not capable, nor is it fit we should yet know, the particulars of that glorious place and state. He did not attempt to publish to the world what he had heard there, but he set forth the doctrine of Christ. On that foundation the church is built, and on that we must build our faith and hope. And while this teaches us to enlarge our expectations of the glory that shall be revealed, it should render us contented with the usual methods of learning the truth and will of God.
Verse 7-10 — The apostle gives an account of the method God took to keep him humble, and to prevent his being lifted up above measure, on account of the visions and revelations he had. We are not told what this thorn in the flesh was, whether some great trouble, or some great temptation. But God often brings this good out of evil, that the reproaches of our enemies help to hide pride from us. If God loves us, he will keep us from being exalted above measure; and spiritual burdens are ordered to cure spiritual pride. This thorn in the flesh is said to be a messenger of Satan which he sent for evil; but God designed it, and overruled it for good. Prayer is a salve for every sore, a remedy for every malady; and when we are afflicted with thorns in the flesh, we should give ourselves to prayer. If an answer be not given to the first prayer, nor to the second, we are to continue praying. Troubles are sent to teach us to pray; and are continued, to teach us to continue instant in prayer. Though God accepts the prayer of faith, yet he does not always give what is asked for: as he sometimes grants in wrath, so he sometimes denies in love. When God does not take away our troubles and temptations, yet, if he gives grace enough for us, we have no reason to complain. Grace signifies the good-will of God towards us, and that is enough to enlighten and enliven us, sufficient to strengthen and comfort in all afflictions and distresses. His strength is made perfect in our weakness. Thus his grace is manifested and magnified. When we are weak in ourselves, then we are strong in the grace of our Lord Jesus Christ; when we feel that we are weak in ourselves, then we go to Christ, receive strength from him, and enjoy most the supplies of Divine strength and grace.
Verse 11-21 — We owe it to good men, to stand up in the defence of their reputation; and we are under special obligations to those from whom we have received benefit, especially spiritual benefit, to own them as instruments in God's hand of good to us. Here is an account of the apostle's behaviour and kind intentions; in which see the character of a faithful minister of the gospel. This was his great aim and design, to do good. Here are noticed several sins commonly found among professors of religion. Falls and misdeeds are humbling to a minister; and God sometimes takes this way to humble those who might be tempted to be lifted up. These vast verses show to what excesses the false teachers had drawn aside their deluded followers. How grievous it is that such evils should be found among professors of the gospel! Yet thus it is, and has been too often, and it was so even in the days of the apostles.