Albert Barnes Commentary 2 Corinthians 7:13

"Therefore we have been comforted: And in our comfort we joyed the more exceedingly for the joy of Titus, because his spirit hath been refreshed by you all." — 2 Corinthians 7:13 (ASV)

Therefore we were comforted in your comfort. The phrase, "your comfort," here seems to mean the happiness they had, or might reasonably be expected to have, in obeying Paul's directions and in the repentance they had manifested. Paul had spoken of no other consolation or comfort than this. The idea seems to be that they were a happy people and would be happy by obeying God's commands.

This fact gave Paul additional joy, and he could not help but rejoice that they had removed the cause of the offense and that they thus would not be exposed to God's displeasure. Had they not repented and put away the evil, the consequences for them would have been deep distress. As it was, they would be blessed and happy.

And exceedingly the more, etc. Titus had been kindly received and hospitably entertained, and had become much attached to them. This was an additional occasion of joy for Paul (see 2 Corinthians 7:7).