The Apostle Paul
2 Corinthians 12:7ESV·traditional attribution

So to keep me from becoming conceited because of the surpassing greatness of the revelations, a thorn was given me in the flesh, a messenger of Satan to harass me, to keep me from becoming conceited.

John Calvin Reformed @genevareformer

7. And lest through the superiority of revelations. Here we have a second reason — that God, designing to repress in him every approach to insolence, subdued him with a rod. That rod he calls a goad, by a metaphor taken from oxen.

Matthew Henry Presbyterian @wholebiblehenry

Here we may observe, I. The narrative the apostle gives of the favours God had shown him, and the honour he had done him; for doubtless he himself is the man in Christ of whom he speaks. Concerning this we may take notice, 1. Of the honour itself which was done to the apostle: he was caught up into the third heaven, Co2 12:2.

Commenting on 2 Corinthians 12:1-10

John Gill Reformed Baptist @doctorgill

And he said unto me,.... Either by what the Jews call "Bath Kol", a voice from heaven, an articulate audible one; or by some extraordinary revelation of the Spirit of God; or by a divine impression upon his mind; whereby he was assured of what follows, my grace is sufficient for thee; the Lord always hears and answers his people sooner or later, in one...