John 12:39

For this reason they could not believe, in him, because evidently they were blinded, and this Isaiah said.

Therefore they could not believe,.... God had determined to leave them to the blindness and hardness of their hearts, and to deny them his grace, which only could cure them of it, and enable them to believe: he had foretold this in prophecy, and they were manifestly the persons spoken of; and therefore considering the decrees of God, the predictions of the prophet, and the hardness of their hearts, they were left unto, it was morally impossible they should believe, because that Esaias said again, in Isa 6:9.

Therefore now they could not believe - That is, by the just judgment of God, for their obstinacy and wilful resistance of the truth, they were at length so left to the hardness of their hearts, that neither the miracles nor doctrines of our Lord could make any impression upon them.

They could not believe - See Mar 6:5; “He could there do no mighty works,” etc. The works can and could are often used in the Bible to denote the existence of such obstacles as to make a result certain, or as affirming that while one thing exists another thing cannot follow. Thus, Joh 5:44; “How can ye believe which receive honor one of another.” That is, while this propensity to seek for honor exists, it will effectually prevent your believing.

THE BLINDNESS of Israel concerning our Lord was sadly remarkable. It was a blindness of the eyes, for they saw his many miracles, and yet believed not: their ears also seemed to be stopped, for they heard his words and did not understand them; and their hearts also were heavy, for they did not relent under the plaintive admonitions of a Saviour's love. Their hearts were cruel towards the Messiah; they hated him without a cause.

The lesson of the words is generally applicable to the whole professing Church of Christ. Its time for doing good in the world is short and limited. The throne of grace will not always be standing—it will be removed one day, and the throne of judgment will be set up in its place. The door of salvation by faith in Christ will not always be open—it will be shut one day forever, and the number of God's elect will be completed. The fountain for all sin and uncleanness will not always be accessible; the way to it will one day be barred, and there will remain nothing but the lake that burns with fire and brimstone. These are solemn thoughts; but they are true. They cry aloud to sleeping Churchmen and drowsy congregations, and ought to arouse great searchings of heart. "Can nothing more be done to spread the Gospel at home and abroad? Has every means been tried for extending the knowledge of Christ crucified? Can we lay our hands on our hearts, and say that the Churches have left nothing undone in the matter of missions? Can we look forward to the Second Advent with no feelings of humiliation, and say that the talents of wealth, and influence, and opportunities have not been buried in the ground?" Such questions may well humble us, when we look, on one side, at the state of professing Christendom, and, on the other, at the state of the heathen world. We must confess with shame that the Church is not walking worthy of its light. But the lesson of the words is specially applicable to ourselves as individuals . Our own time for getting good is short and limited; let us take heed that we make good use of it. Let us "walk while we have the light." Have we Bibles? Let us not neglect to read them. Have we the preached Gospel? Let us not linger halting between two opinions, but believe to the saving of our souls. Have we Sabbaths?

THE BLINDNESS of Israel concerning our Lord was sadly remarkable. It was a blindness of the eyes, for they saw his many miracles, and yet believed not: their ears also seemed to be stopped, for they heard his words and did not understand them; and their hearts also were heavy, for they did not relent under the plaintive admonitions of a Saviour's love. Their hearts were cruel towards the Messiah; they hated him without a cause. No door was open to the heart of Israel; they had hardened their heart, they had shut their eyes, they had stopped their ears, and even he that spake as never man spake gained no access to their souls. They went so far as to crucify him, and cried as they did so, "His blood be on us, and our children,"—words so sadly verified when Jerusalem was destroyed, and her children slaughtered, sold as slaves, or scattered to the four corners of the earth. It was indeed, a terrible blindness which happened unto Israel. Her rejection of the Lord Jesus is the more amazing because Isaiah gave so clear an account of the Messiah, and so clearly pictured Jesus of Nazareth. Descriptions of him could not have been more explicit than were the prophecies of Isaiah. It would be very easy to construct an entire life of Christ out of the book of Isaiah, beginning with "a virgin shall conceive and bear a son, and shall call his name Immanuel," and ending with "he made his grave with the wicked and with the rich in his death." Isaiah spake of John the Baptist as the "voice crying in the wilderness, prepare ye the way of the Lord, make straight in the desert a highway for our God," and he foretold our Lord's ministry by the way of the sea beyond Jordan in Galilee of the Gentiles, where the people who sat in darkness saw great light.

The lesson of the words is generally applicable to the whole professing Church of Christ. Its time for doing good in the world is short and limited. The throne of grace will not always be standing—it will be removed one day, and the throne of judgment will be set up in its place. The door of salvation by faith in Christ will not always be open—it will be shut one day forever, and the number of God's elect will be completed.

Therefore they could not believe - Why? Because they did not believe the report of the prophets concerning Christ; therefore they credited not the miracles which he wrought as a proof that he was the person foretold by the prophets, and promised to their fathers. Having thus resisted the report of the prophets, and the evidence of Christ’s own miracles, God gave them up to the darkness and hardness of their own hearts, so that they continued to reject every overture of Divine mercy; and God refused to heal their national wound, but, on the contrary, commissioned the Romans against them, so that their political existence was totally destroyed. The prophecy of Isaiah was neither the cause nor the motive of their unbelief: it was a simple prediction, which imposed no necessity on them to resist the offers of mercy. They might have believed, notwithstanding the prediction, for such kinds of prophecies always include a tacit condition; they may believe, if they properly use the light and power which God has given them. Such prophecies also are of a general application - they will always suit somebody, for in every age persons will be found who resist the grace and Spirit of God like these disobedient Jews. However, it appears that this prediction belonged especially to these rejecters and crucifiers of Christ; and if the prophecy was infallible in its execution, with respect to them, it was not because of the prediction that they continued in unbelief, but because of their own voluntary obstinacy; and God foreseeing this, foretold it by the prophet. Should I say that, they could not believe, means, they would not believe, I should perhaps offend a generation of his children; and yet I am pretty certain the words should be so understood. […]