For to this end also did I write, that I might know the proof of you, whether you be obedient in all things.
All Commentaries on 2 Corinthians 2:9 Go To 2 Corinthians 2
George Leo Haydock
AD 1849
This was another reason why I wrote my former letter to you, viz. to try your obedience, and your attachment to the faith, and that I might know whether the difference of opinion which prevailed among you had prevented you from being obedient. (Calmet)
Others explain it thus: I have written this second letter to you to try your obedience, and to know if you will pay the same obedience to my orders, when I tell you to receive the incestuous man into your communion, as you did when I told you to separate him from your communion. (Estius and Theodoret)