The Apostle Paul
2 Corinthians 12:16BSB·traditional attribution

Be that as it may, I was not a burden to you; but crafty as I am, I caught you by trickery.

John Calvin Reformed @genevareformer

16. But be it so. These words intimate, that Paul had been blamed by malevolent persons, as though he had in a clandestine way procured, through means of hired persons, what he had refused to receive with his own hands “This passage is so far from being friendly to the exercise of guile, that it is a manifest disavowal of it. It is an irony.

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

I desired Titus, and with him I sent a brother,.... The apostle proceeds to mention one or two persons that he had sent unto them, and desires to know whether they could charge them with any such practices. He had desired, exhorted, and encouraged Titus to go unto them, and collect money from them; but not for either of themselves, but for the poor saints...