The Apostle Paul
2 Corinthians 7:13BSB·traditional attribution

On account of this, we are encouraged. In addition to our own encouragement, we were even more delighted by the joy of Titus. For his spirit has been refreshed by all of you.

John Calvin Reformed @genevareformer

13. We received consolation. Paul was wholly intent upon persuading the Corinthians, that nothing was more eagerly desired by him than their advantage. Hence he says, that he had shared with them in their consolation. Now their consolation had been this — that, acknowledging their fault, they did not merely take the reproof in good part, but had received it joyfully.

Matthew Henry Presbyterian @wholebiblehenry

In these verses the apostle endeavours to comfort the Corinthians, upon whom his admonitions had had such good effect. And in order thereto, 1. He tells them he had a good design in his former epistle, which might be thought severe, Co2 7:12.

Commenting on 2 Corinthians 7:12-16

John Gill Reformed Baptist @doctorgill

Therefore we were comforted in your comfort,.... In the comfortable situation the church was in; not in their grief and sorrow, as a natural passion, but in the effects of it as a godly sorrow; by which it appeared that their repentance was genuine, and that they were clear in the matter that had given so much trouble; and that things had so well succeeded...