Romans 11:31

“Even so have these also now not believed, etc..] Now is the time of the Jews' unbelief, blindness has happened to them, the vail is over their hearts; as the Gentiles formerly did not believe God, so the Jews do not now; though they believe there is a God, and that there is but one God, yet they do not believe God in Christ; nor that he is the Father of Christ; or that Christ is the Son of God, the true Messiah, and Saviour of the world: they do not believe, as some read the words, connecting them with the next clause, and so they stand in the original text, “in your mercy”; meaning either Christ, in whom the Gentiles obtained mercy; or the Gospel, the means of it; or the sense is, that they…”

“Even so have these--the Jews. now not believed--or, "now been disobedient" that through your mercy--the mercy shown to you. they also may obtain mercy--Here is an entirely new idea. The apostle has hitherto dwelt upon the unbelief of the Jews as making way for the faith of the Gentiles--the exclusion of the one occasioning the reception of the other; a truth yielding to generous, believing Gentiles but mingled satisfaction. Now, opening a more cheering prospect, he speaks of the mercy shown to the Gentiles as a means of Israel's recovery; which seems to mean that it will be by the instrumentality of believing Gentiles that Israel as a nation is at length to "look on Him whom they have…”

“Even so have these ... - That is, the Jews. That through your mercy ... - The immediate effect of the unbelief of the Jews was to confer salvation on the Gentiles, or to open the way for the preaching of the gospel to them. But its remote effect would be to secure the preaching of the gospel again to the Jews. Through the mercy, that is, the compassion or deep feeling of the converted Gentiles; through the deep and tender pity which they would feel for the blinded and degraded Jews: the gospel should be again carried to them, and they should be recalled to the long lost favor of God. Each party should thus cause salvation to come to the other - the Jews to the Gentiles by their unbelief; but…”

“believed: or, obeyed, Rom 10:16, Rom 11:15, Rom 11:25 Romans 11:32”