2 Corinthians 7:10-11

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.