2 Corinthians 7:9-11

9I now rejoice, 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.

10For godly grief produces a repentance that leads to salvation without regret, but worldly grief produces death.

11For consider how much diligence this very thing — this grieving as God wills — has produced in you: what a desire to clear yourselves, what indignation, what fear, what deep longing, what zeal, what justice! In every way you showed yourselves to be pure in this matter.