2 Corinthians 2:4

2:4 For out of great distress and anguish of heart I wrote to you with many tears, not to make you sad, but to let you know the love that I have especially for you.

2 Corinthians 7:11

7:11 For see what this very thing, this sadness as God intended, has produced in you: what eagerness, what defense of yourselves, what indignation, what alarm, what longing, what deep concern, what punishment! In everything you have proved yourselves to be innocent in this matter.