For though I made you sorry with a letter, I do not regret, though I did regret: for I perceive that the same epistle has made you sorry, though it were but for a time.
All Commentaries on 2 Corinthians 7:8 Go To 2 Corinthians 7
Augustine of Hippo
AD 430
Moreover, even sorrow, the emotion for which, the Stoics claim, there can be found in the soul of a wise man no corresponding “attitude,” is a word used in a good sense, especially in Christian writings. The apostle, for example, praises the Corinthians because they were sorrowful according to God. Of course, someone may object that the apostle congratulated the Corinthians because their sorrow led them to repentance and that such sorrow can be experienced only by those who have sinned. What he says is this: “Seeing that the same letter did for a while make you sorry, now I am glad; not because you were made sorry but because your sorrow led you to repentance. For you were made sorry according to God, that you might suffer no loss at our hands. For the sorrow that is according to God produces repentance that surely tends to salvation, whereas the sorrow that is according to the world produces death. For behold this very fact that you were made sorry according to God, what earnestness it has wrought in you.”