Now I rejoice, not that you were made sorry, but that you sorrowed to repentance: for you were made sorry after a godly manner, that you might suffer loss by us in nothing.
All Commentaries on 2 Corinthians 7:9 Go To 2 Corinthians 7
John Chrysostom
AD 407
Like a father who watches his son being operated on, Paul rejoices not for the pain being inflicted but for the cure which is the ultimate result. He had no desire to cause harm for its own sake.