As it is, I rejoice, not because you were grieved, but because you were grieved into repenting. For you felt a godly grief, so that you suffered no loss through us.
9. Not because you have been made sorry. He means, that he feels no pleasure whatever in their sorrow — nay more, had he his choice, he would endeavor to promote equally their welfare and their joy, by the same means; but that as he could not do otherwise, their welfare was of so much importance in his view, that he rejoiced that they had been made sorry unto repentance.
There seems to be a connection between Co2 2:13 (where the apostle said he had no rest in his spirit when he found not Titus at Troas) and the fifth verse of this chapter: and so great was his affection to the Corinthians, and his concern about their behaviour in relation to the incestuous person, that, in his further travels, he still had no rest till he heard from them.
Commenting on 2 Corinthians 7:5-11
Now I rejoice, not that ye were made sorry,.... Their grief and sorrow, as a natural passion, was no matter or cause of joy to him; nor was this what he sought after, being what he could take no real pleasure in; for so far as that was a pain to them, it was a pain to him: but that ye sorrowed to repentance; their...