2 Corinthians 12:13

"For what is there wherein ye were made inferior to the rest of the Churches?" 'Ye were partakers,' he says, 'of no less grace than the others.' But perhaps some one will say, 'What can be the reason that he turns the discourse upon the Apostles, abandoning the contest against the false Apostles?' Because he is desirous to erect their spirits yet further, and to show that he is not only superior to them, but not even inferior to the great Apostles. Therefore, surely, when he is speaking of those he says, "I am more;" but when he compares himself with the Apostles, he considers it a great thing not to be "behind," although he labored more than they. And thence he shows that they insult the Apostles, in holding him who is their equal second to these men. "Except it be that I myself was not a burden to you?" Again he has pronounced their rebuke with great severity. And what follows is of yet more odious import. "Forgive me this wrong." Still, nevertheless, this severity contains both words of love and a commendation of themselves; if, that is, they consider it a wrong done to them, that the Apostle did not consent to receive aught from them, nor relied on them enough to be supported by them. 'If,' says he, 'ye blame me for this:' he did not say, 'Ye blame me wrongly,' but with great sweetness, 'I ask your pardon, forgive me this fault.'

And observe his prudence. For because the mooring this continually tended to bring disgrace upon them, he continually softens it down; saying above, for instance, "As the truth of Christ is in me, this boasting shall not be stopped in me;" then again, "Because I love you not? God knoweth....But that I may cut off occasion from them that desire occasion, and that wherein they glory, they may be found even as we." And in the former Epistle "What is my reward then?" Verily, "that when I preach the Gospel, I may make the Gospel without charge." And here "Forgive me this wrong." For every where he avoids showing that it is on account of their weakness he taketh not from them; and here not to wound them. And therefore here he thus expresses himself; 'If ye think this to be an offense, I ask forgiveness.' Now he spoke thus, at once to wound and to heal. For do not say this, I pray thee; 'If thou meanest to wound, why excuse it? but if thou excusest it, why wound?' For this is wisdom's part, at once to lance, and to bind up the sore.

Paul is telling the Corinthians that they were better off than other churches. Corinth was the only place where he preached the gospel without being paid for it.

Then he excludes an objection, when he says, For in what were you less favored than the rest of the churches? For the Corinthians could answer and say: it is true that you have done many good and great things, but others have done more …

For what is it wherein ye were inferior to other churches,....