2 Corinthians 7:8-11

For even if I grieved you with my letter, I do not regret it—though I did regret it, for I see that my letter grieved you, but just for a while. Now I rejoice, not that you were grieved, but that you were grieved to the point of repentance. For you were grieved according to God’s will, so that you might in no way suffer loss from us. For the grief that God wills brings a repentance that leads to salvation, leaving no regret. But the world’s grief brings death. For see what this very thing—this grieving that God wills—has brought you! What diligence, what defense, what indignation, what fear, what longing, what zeal, what rendering of justice! In everything you have proved yourselves to be innocent in this matter.