For sadness as intended by God produces a repentance that leads to salvation, leaving no regret, but worldly sadness brings about death.

So I made up my own mind not to pay you another painful visit.

so that now instead you should rather forgive and comfort him. This will keep him from being overwhelmed by excessive grief to the point of despair.

Each one of you should give just as he has decided in his heart, not reluctantly or under compulsion, because God loves a cheerful giver.

And I wrote this very thing to you, so that when I came I would not have sadness from those who ought to make me rejoice, since I am confident in you all that my joy would be yours.