The noun Paul uses (σκόλοψ) refers to any kind of splinter or thorn that works its way into the body, but the thorn is also called a “messenger of Satan” of “angel of Satan.” By describing the thorn this way, Paul may be referring to a person who was harassing him, continually causing him to suffer.
This messenger “harasses” Paul. This verb (κολαφίζω) is a violent physical beating, the same word is used for Jesus’ beatings in Matt 26:67 and Mark 14:65. Since it is not clear what Paul means by this thorn, Christians have suggested the beatings are not physical. Suggestions include: hysteria, depression, headaches, severe eye trouble, malaria, leprosy, and even a speech impediment (See BDAG for scholars associated with each suggestion). If this is a physical illness, it could be a sign of God’s judgment; the opponent could use something like this to call into question everything Paul teaches!
God allowed Paul to endure this suffering in order to keep him humble. This is an ongoing torment of some kind, since Paul prayed three times to have the thorn taken from him. The purpose of the thorn is to keep Paul from being exalted because of his visionary experience. The verb (ὑπεραίρω) refers to developing an “an undue sense of one’s self-importance” (BDAG). The thorn therefore was given to keep Paul from getting a big head about how important he is!
The only response to this prayer given by the Lord is “My grace is sufficient for you, for my power is made perfect in weakness.” This is one of the most memorable verses in the New Testament and has helped many people through extremely difficult times. Like Paul, people who suffer physical or emotional torment consider this verse a great comfort since God’s grace is all they need. But notice it God’s grace does not guarantee Paul will be rescued from his thorn in the flesh! In fact, the comfort of this verse is that despite intense suffering, God’s grace is all Paul wants or needs!
It is when Paul is weak the power of God is most clearly seen. If Paul were an elite orator or a well-trained sophist, or a prophet who has the most glorious of visions, then the success he had in Corinth would be all his; he would easily slip into the error the opponents are making and glorify himself.
It is not that we ought to forego any preparation for ministry and only appoint the most unprepared people to serve; but when that preparation becomes a platform for boasting then the Lord is no longer glorified. Paul therefore concludes this chapter the same way he started in 2 Cor 13, boasting in his suffering all the more!
What is Paul’s point by boasting in his suffering in 12:10? As he concluded after his catalog of suffering in chapter 11, Paul claims his suffering proves he is a true apostle (and the “super apostles are not). As Barrett concludes, “The real point is that the requirement of self-sacrifice … marks out the true apostle from the false” (284-5). The pastor who works two jobs to serve a small country church is nearer to Paul’s model, his imitation of Christ, than a pastor who asks for 65 million for a private jet.
Would a Mega-Church pastor give up his wealth to care for a small inner city congregations for little or no money at all? Jesus gave up everything, as did Paul; but Paul’s opponents would not. What makes them spiritual leaders is their wealth and prestige, the exact opposite of Paul’s point here in 2 Corinithians.