The Apostle Paul
1 Corinthians 4:19BSB·traditional attribution

But I will come to you shortly, if the Lord is willing, and then I will find out not only what these arrogant people are saying, but what power they have.

John Calvin Reformed @genevareformer

19. But I will come shortly. “They are in a mistake,” says he, “in raising their crests during my absence, as though this were to be of long duration, for they shall in a short time perceive how vain their confidence has been.” He has it not, however, so much in view to terrify them, as though he would on his arrival thunder forth against...

Matthew Henry Presbyterian @wholebiblehenry

Here, I. He tells them of his having sent Timothy to them, to bring them into remembrance of his ways in Christ, as he taught every where in every church (Co1 4:17) - to remind them of his ways in Christ, to refresh their memory as to his preaching and practice, what he taught, and how he lived among them.

Commenting on 1 Corinthians 4:17-21

John Gill Reformed Baptist @doctorgill

But I will come to you shortly,.... This he said as threatening them, but not by way of prophecy; for it is not certain that he ever did come to them after this; but by way of promise, as it was then the real intention, inclination, and resolution of his mind, though with this condition, if the Lord will; which is rightly put, and what...