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.
19. But I say, Did not Israel know?—know, from their own Scriptures, of God's intention to bring in the Gentiles?
First—that is First in the prophetic line [De Wette].
Moses saith, &c.—"I will provoke you to jealousy ('against') [them that are] not a nation, and against a nation without understanding will I anger you" (De 32:21). In this verse God warns His ancient people that because they had (that is, in aftertimes would) moved Him to jealousy with their "no-gods," and provoked Him to anger with their vanities, He in requital would move them to jealousy by receiving into His favor a "no-people," and provoke them to anger by adopting a nation void of understanding.