The Apostle Paul
2 Corinthians 12:13ESV·traditional attribution

For in what were you less favored than the rest of the churches, except that I myself did not burden you? Forgive me this wrong!

John Calvin Reformed @genevareformer

13. What is there in which. Here is an aggravation of their ingratitude — that he had been distinguished, that they might receive benefit — that they had derived advantage from the attestation furnished of his Apostleship, and had, notwithstanding, given their concurrence to the slanders “Aux injures et detractions;” — “The insults and slanders.” of the false Apostles.

Matthew Henry Presbyterian @wholebiblehenry

In these verses the apostle addresses himself to the Corinthians two ways: - I. He blames them for what was faulty in them; namely, that they had not stood up in his defence as they ought to have done, and so made it the more needful for him to insist so much on his own vindication.

Commenting on 2 Corinthians 12:11-21

John Gill Reformed Baptist @doctorgill

And I will gladly spend,.... Meaning all his time, talents, and strength, which God had bestowed upon him for their spiritual profit and advantage; yea, all that small pittance of worldly goods that he enjoyed: he not only determined to take nothing from them, but was willing to communicate his little substance to them, or spend it in their service; and not only so, but...