But Esaias is very {o} bold, and saith, I was found of them that sought me not; I was made manifest unto them that asked not after me.

(o) Speaks without fear.

People's New Testament

10:19-21 Did not Israel know? Why, the Jew is supposed to object, if the Gospel has been extended so widely, is the greater portion of Israel in ignorance that the Gentiles were to be saved? Paul replies that Israel should have known:

First, Moses saith. (1) Moses foretells the call of another people to the favor of God (De 32:21);

Esaias... saith. (2) Isaiah still more plainly predicts the salvation of the Gentiles in Isa 65:1, and (3) he predicts the falling away of Israel in Isa 65:2.

Wesley's Notes

10:20 But Isaiah is very bold - And speaks plainly what Moses but intimated. Isa 65:1,2.

Jamieson-Fausset-Brown Bible Commentary

20. But Esaias is very bold, and saith-that is, is still plainer, and goes even the length of saying.

I was found of them that sought me not-until I sought them.

I was made-"became"

manifest unto them that asked not after me-until the invitation from Me came to them. That the calling of the Gentiles was meant by these words of the prophet (Isa 65:1) is manifest from what immediately follows, "I said, Behold Me, behold Me, unto a nation that was not called by My name."

Matthew Henry's Concise Commentary

10:18-21 Did not the Jews know that the Gentiles were to be called in? They might have known it from Moses and Isaiah. Isaiah speaks plainly of the grace and favour of God, as going before in the receiving of the Gentiles. Was not this our own case? Did not God begin in love, and make himself known to us when we did not ask after him? The patience of God towards provoking sinners is wonderful. The time of God's patience is called a day, light as day, and fit for work and business; but limited as a day, and there is a night at the end of it. God's patience makes man's disobedience worse, and renders that the more sinful. We may wonder at the mercy of God, that his goodness is not overcome by man's badness; we may wonder at the wickedness of man, that his badness is not overcome by God's goodness. And it is a matter of joy to think that God has sent the message of grace to so many millions, by the wide spread of his gospel.