2 Corinthians 7:12

So although I wrote unto you [for what he had written, see 1 Corinthians 5:1-5], I wrote not for his cause that did the wrong [i. e., the incestuous son], nor for his cause that suffered the wrong [i. e., the injured father], but that your earnest core for us might be made manifest unto you in the sight of God. [In writing to you to discipline the incestuous man, I was not moved by the small motive of setting to rights a difficulty between two parties, though one of them was clearly a wrongdoer, and the other obviously a sufferer by reason of his wrong-doing. My motive was much larger. I wished you to see that despite all the accusations brought against me to which you gave ear, you still show, by your own conduct, as you view it in the sight of God, that you know better than to disobey me.]