| Barnes' Notes on the Bible Wherefore? - Why? The apostle proceeds to state the reason why so uniform and remarkable a result happened. "They sought it not by faith, etc." They depended on their own righteousness, and not on the mercy of God to be obtained by faith. By the works of the law - By complying with all the demands of the Law so that they might merit salvation. Their attempted obedience included their prayers, fastings, sacrifices, etc., as well as compliance with the demands of the moral law. It may be asked here, perhaps, how the Jews could know any better than this? how should they know anything about justification by faith? To this I:answer: (1) That the doctrine was stated in the Old Testament; see Habakkuk 2:4; compare Romans 1:17; Psalm 32:1-11; Psalm 130:1-8; Psalm 14:1-7; compare Romans 3; Job 9:2. (2) the sacrifices had reference to a future state of things, and were doubt less so understood; see the Epistle to the Hebrews. (3) the "principle" of justification, and of living by faith, had been fully brought out in the lives and experience of the saints of old; see Romans 4 and Hebrews 11. They stumbled - They fell; or failed; or "this was the cause why they" did not obtain it. At that stumbling-stone - To wit, at what he specifies in the following verse. "A stumbling-stone" is a stone or impediment in the path over which people may fall. Here it means "that obstacle which prevented their attaining the righteousness of faith; and which was the occasion of their fall, rejection, and ruin." That was the rejection and the crucifixion of their own Messiah; their unwillingness to be saved by him; their contempt of him and his message. For this God withheld from them the blessings of justification, and was about to cast them off as a people. This also the apostle proceeds to prove was foretold by the prophets.
Clarke's Commentary on the BibleWherefore? - And where lies their mistake? Being ignorant of God's righteousness - of his method of saving sinners by faith in Christ, they went about to establish their own righteousness - their own method of obtaining everlasting salvation. They attend not to the Abrahamic covenant, which stands on the extensive principles of grace and faith; but they turn all their regards to the law of Moses. They imagine that their obedience to that law gives them a right to the blessings of the Messiah's kingdom. But, finding that the Gospel sets our special interest in God and the privileges of his Church on a different footing, they are offended, and refuse to come into it.
Gill's Exposition of the Entire BibleWherefore? because they sought it not by faith,.... The question is asked, why they did not attain to that, which with so much diligence they pressed after? the answer is, because, as they did not seek for righteousness in a right place, or object, they sought for it in the law, and the works of it, where it is never to be found by a sinful creature, and not in Christ, in whom only are righteousness and strength; so they did not seek for it in a right way, by faith in Christ, without which it is impossible to please God, and by which only true righteousness is discerned and received: but as it were by the works of the law; not by works which looked like works of the law, and were not; but they sought it as if they expected their justification before God was to be by works of righteousness done by them; or as if it was partly by their own works, and partly by the goodness of God, accepting of them for a justifying righteousness. The Alexandrian Copy, and some others, read only, "as it were by works"; and so does the Vulgate Latin version: another reason, or else a reason of the former is, for they stumbled at that stumbling stone; meaning the word of the Gospel, at which Peter says they stumbled, and particularly the doctrine of justification by the righteousness of Christ; or rather Christ himself, who was "to the Jews a stumbling block, and to the Greeks foolishness", 1 Corinthians 1:23.
Vincent's Word StudiesNot by faith (οὐκ ἐκ πίστεως) A.V. and Rev. supply the ellipsis, they sought it not. They stumbled (προσέκοψαν) "In their foolish course Israel thought they were advancing on a clear path, and lo! all at once there was found in this way an obstacle upon which they were broken; and this obstacle was the very Messiah whom they had so long invoked in all their prayers" (Godet).
Geneva Study BibleWherefore? Because they sought it not by faith, but as it were by the {s} works of the law. For they stumbled at that stumblingstone; (s) Seeking to attain righteousness, they followed the law of righteousness.
People's New Testament 9:32 Wherefore? Why this failure on the part of Israel? Not because God willed that they should be rejected, not because of any foreordination, but because of their unbelief in Christ. Because they sought it not by faith. Sought not the righteousness that comes from faith in Christ, but a righteousness of works by keeping the law of Moses. They stumbled at the stumblingstone. At faith in Christ, in a Crucified Christ. This is one cause of Israel's failure. This is the one cause of Israel's failure. They fell through unbelief.
Wesley's Notes 9:32 And wherefore have they not? Is it because God eternally decreed they should not? There is nothing like this to be met with but agreeable to his argument the apostle gives us this good reason for it, Because they sought it not by faith - Whereby alone it could be attained. But as it were - In effect, if not professsedly, by works. For they stumbled at that stumblingstone - Christ crucified.
Jamieson-Fausset-Brown Bible Commentary32, 33. Wherefore? Because they sought it not by faith, but as it were-rather simply, "as" by the works of the law-as if it were thus attainable, which justification is not: Since, therefore, it is attainable only by faith, they missed it. for-it is doubtful if this particle was originally in the text. they stumbled at that stumbling-stone-better, "against the stone of stumbling," meaning Christ. But in this they only did.
Matthew Henry's Concise Commentary9:30-33 The Gentiles knew not their guilt and misery, therefore were not careful to procure a remedy. Yet they attained to righteousness by faith. Not by becoming proselytes to the Jewish religion, and submitting to the ceremonial law; but by embracing Christ, and believing in him, and submitting to the gospel. The Jews talked much of justification and holiness, and seemed very ambitious to be the favourites of God. They sought, but not in the right way, not in the humbling way, not in the appointed way. Not by faith, not by embracing Christ, depending upon Christ, and submitting to the gospel. They expected justification by observing the precepts and ceremonies of the law of Moses. The unbelieving Jews had a fair offer of righteousness, life, and salvation, made them upon gospel terms, which they did not like, and would not accept. Have we sought to know how we may be justified before God, seeking that blessing in the way here pointed out, by faith in Christ, as the Lord our Righteousness? Then we shall not be ashamed in that awful day, when all refuges of lies shall be swept away, and the Divine wrath shall overflow every hiding-place but that which God hath prepared in his own Son.
Matthew Henry's Whole Bible CommentaryVerses 30-33 The apostle comes here at last to fix the true reason of the reception of the Gentiles, and the rejection of the Jews. There was a difference in the way of their seeking, and therefore there was that different success, though still it was the free grace of God that made them differ. He concludes like an orator, What shall we say then? What is the conclusion of the whole dispute? I. Concerning the Gentiles observe, 1. How they had been alienated from righteousness: the followed not after it; they knew not their guilt and misery, and therefore were not at all solicitous to procure a remedy. In their conversion preventing grace was greatly magnified: God was found of those that sought him not, Isa. 65:1. There was nothing in them to dispose them for such a favour more than what free grace wrought in them. Thus doth God delight to dispense grace in a way of sovereignty and absolute dominion. 2. How they attained to righteousness, notwithstanding: By faith; not by being proselyted to the Jewish religion, and submitting to the ceremonial law, but by embracing Christ, and believing in Christ, and submitting to the gospel. They attained to that by the short cut of believing sincerely in Christ for which the Jews had been long in vain beating about the bush. II. Concerning the Jews observe, 1. How they missed their end: they followed after the law of righteousness (v. 31)-they talked much of justification and holiness, seemed very ambitious of being the people of God and the favourites of heaven, but they did not attain to it, that is, the greatest part of them did not; as many as stuck to their old Jewish principles and ceremonies, and pursued a happiness in those observances, embracing the shadows now that the substance was come, these fell short of acceptance with God, were not owned as his people, nor went to their house justified. 2. How they mistook their way, which was the cause of their missing the end, v. 32, 33. They sought, but not in the right way, not in the humbling way, not in the instituted appointed way. Not by faith, not by embracing the Christian religion, and depending upon the merit of Christ, and submitting to the terms of the gospel, which were the very life and end of the law. But they sought by the works of the law; as if they were to expect justification by their observance of the precepts and ceremonies of the law of Moses. This was the stumbling-stone at which they stumbled. They could not get over this corrupt principle which they had espoused, That the law was given them for no end but that merely by their observance of it, and obedience to it, they might be justified before God: and so they could by no means be reconciled to the doctrine of Christ, which brought them off from that to expect justification through the merit and satisfaction of another. Christ himself is to some a stone of stumbling, for which he quotes Isa. 8:14; 28:16. It is sad that Christ should be set for the fall of any, and yet it is so (Lu. 2:34), that ever poison should be sucked out of the balm of Gilead, that the foundation-stone should be to any a stone of stumbling, and the rock of salvation a rock of offence; so he is to multitudes; so he was to the unbelieving Jews, who rejected him, because he put an end to the ceremonial law. But still there is a remnant that do believe on him; and they shall not be ashamed, that is, their hopes and expectations of justification by him shall not be disappointed, as theirs are who expect it by the law. So that, upon the whole, the unbelieving Jews have no reason to quarrel with God for rejecting them; they had a fair offer of righteousness, and life, and salvation, made to them upon gospel terms, which they did not like, and would not come up to; and therefore, if they perish, they may thank themselves-their blood is upon their own heads. | 
