2 Corinthians 2:9

For to this end also did I write, that I might know the proof of you, whether ye are obedient in all things. [This shows that Paul had made his instructions concerning the incestuous man a test. If they obeyed him, in this, he could come to them bringing joy: if they disobeyed, their condition would call for further delay and more letters on his part. Where, then, is laid bare before the Corinthians the inner thoughts which were governing the actions of the apostle at the time when he was penning the fifth chapter of his first epistle. They could see now for themselves that their own foolish conduct, and not the fickleness of the apostle, had caused the delay and the change of plan; that so far as the apostle was concerned, he had always intended to visit them, and that all his statements about his visits had been made in good faith. Observe that as the apostle had become the leader in punishment or discipline, he here becomes the leader in forgiveness.]