The Apostle Paul
2 Corinthians 7:14BSB·traditional attribution

Indeed, I was not embarrassed by anything I had boasted to him about you. But just as everything we said to you was true, so our boasting to Titus has proved to be true as well.

John Calvin Reformed @genevareformer

14. But if I have boasted any thing to him. He shows indirectly, how friendly a disposition he had always exercised towards the Corinthians, and with what sincerity and kindness he had judged of them; for at the very time that they seemed to be unworthy of commendation, he still promised much that was honorable on their behalf.

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

For if I have boasted anything to him of you,.... As of their faith in Christ, of their liberality to the saints, their affection for him, and obedience to him as children to a father: I am not ashamed; since these all appeared to be true; as he must have been had they been otherwise: but as we spake all things to you in truth...