2 Corinthians 7:8-9; 2 Corinthians 7:12-13
For although I grieved you with my letter, I do not regret it-even though I did regret it since I saw that the letter grieved you, though only for a little while.
Now I am rejoicing, not because you were grieved, but because your grief led to repentance. For you were grieved as God willed, so that you didn't experience any loss from us.
So even though I wrote to you, it was not because of the one who did wrong, or because of the one who was wronged, but in order that your diligence for us might be made plain to you in the sight of God.
For this reason we have been comforted. In addition to our comfort, we were made to rejoice even more over the joy Titus had, because his spirit was refreshed by all of you.