The Apostle Paul
Romans 10:18ESV·traditional attribution

But I ask, have they not heard? Indeed they have, for “Their voice has gone out to all the earth, and their words to the ends of the world.”

John Calvin Reformed @genevareformer

18. But I say, have they not heard? etc. Since the minds of men are imbued, by preaching, with the knowledge of God, which leads them to call on God, it remained a question whether the truth of God had been proclaimed to the Gentiles; for that Paul had suddenly betaken himself to the Gentiles, there was by that novelty no small offense given.

Matthew Henry Presbyterian @wholebiblehenry

The first words express the design of the apostle through these verses, that there is no difference between Jews and Gentiles, but they stand upon the same level in point of acceptance with God. In Jesus Christ there is neither Greek nor Jews, Col 3:11.

Commenting on Romans 10:12-21

John Gill Reformed Baptist @doctorgill

But I say, have they not heard?.... , "but I say", is a phrase frequently used by the Jewish doctors in disputation, either in forming or answering objections. The Ethiopic version confines these words to Israel, and reads, "have not Israel heard?" whereas they are to be understood both of Jews and Gentiles; the question refers to each, and the answer is, yes, verily: which...