John 12:40

Through them, to wit, had "the heart of the People been made thick, lest they should see with the eyes, and hear with the ears, and understand with a heart" obstructed by the "fats" of which He had expressly forbidden the eating, teaching man not to be studious of the stomach.

(Hom. lxviii) For He does not leave us, except we wish Him, as He saith in Hosea, Seeing thou hast forgotten the law of thy God, I will also forget thy children. (Hos. 4:6) Whereby it is plain that we begin to forsake first, and are the cause of our own perdition. For as it is not the fault of the sun, that it hurts weak eyes, so neither is God to blame for punishing those who do not attend to His words.

(Tr. liii. 5) But what follows involved a deeper question: Therefore they could not believe, because that Esaias said again, He hath blinded their eyes, and hardened their hearts, that they should not see with their eyes, nor understand with their heart, and be converted, and I should heal them. That they should not believe; but if so, what sin is there in a man doing what he cannot help doing? And what is a graver point still, the cause is assigned to God; since He it is who blinded their eyes, and hardened their heart. This is not said to be the devil's doing, but God's. Yet if any ask why they could not believe, I answer, Because they would not. For as it is to the praise of the Divine will that God cannot deny Himself, so is it the fault of the human will that they could not believe.

But the words of the Gospel also, that follow, are still more pressing, and start a question of more profound import: for He goes on to say, "Therefore they could not believe, because that Isaiah said again, He hath blinded their eyes, and hardened their heart; that they should not see with their eyes, nor understand with their heart, and be converted, and I should heal them." For it is said to us: If they could not believe, what sin is it in man not to do what he cannot do and if they sinned in not believing, then they had the power to believe, and did not use it. If, then, they had the power, how says the Gospel, "Therefore they could not believe, because that Isaiah said again, He hath blinded their eyes, and hardened their heart;" so that (which is of grave import) to God Himself is referred the cause of their not believing, inasmuch as it is He who "hath blinded their eyes, and hardened their heart"?

"They could not believe," because that Isaiah the prophet foretold it; and the prophet foretold it because God foreknew that such would be the case. But if I am asked why they could not, I reply at once, because they would not; for certainly their depraved will was foreseen by God, and foretold through the prophet by Him from whom nothing that is future can be hid.

(Tr. liii. 5) But the Prophet, you say, mentions another cause, not their will; viz. that God had blinded their eyes, and hardened their heart. But I answer, that they well deserved this. For God hardens and blinds a man, by forsaking and not supporting him; and this He may by a secret sentence, by an unjust one He cannot.

(Tr. liii. 11) And be converted, and I should heal them. Is not to be understood here, from the beginning of the sentence—that they should not see with their eyes, nor understand with their hearts, nor be converted; conversion being the free gift of God? or shall we suppose that a heavenly remedy is meant; whereby those who wished to establish their own righteousness, were so far deserted and blinded, as to stumble on the stumbling stone, till, with confusion of face, they humbled themselves, and sought not their own righteousness which puffeth up the proud, but God's righteousness, which justifieth the ungodly. For many of those who put Christ to death, were afterward troubled with a sense of their guilt; which led to their believing in Him.

But the prophet, sayest thou, assigns another cause than that of their will. What cause does the prophet assign? That "God hath given them the spirit of remorse, eyes that they should not see, and ears that they should not hear; and hath blinded their eyes, and hardened their heart." This also, I reply, their will deserved. For God thus blinds and hardens, simply by letting alone and withdrawing His aid: and God can do this by a judgment that is hidden, although not by one that is unrighteous. This is a doctrine which the piety of the God-fearing ought to preserve unshaken and inviolable in all its integrity: even as the apostle, when treating of the same intricate question, says, "What shall we say then? is there unrighteousness with God? God forbid." If, then, we must be far from thinking that there is unrighteousness with God, this only can it be, that, when He giveth His aid, He acteth mercifully; and, when He withholdeth it, He acteth righteously: for in all He doeth, He acteth not rashly, but in accordance with judgment.

It was not however with intent to fulfil the prophecies that the Jews slew the Lord, for in that case they would not have been impious; but it was by reason of their own malignity. For although the prophets foretold the things which were certainly to be brought to pass by their determined evil counsel, they foretold it for this cause, that the sober might leap over the pitfalls of the devil: for surely they who heard might also have taken heed. On which, account also the prediction was needful.

That it was not God Who blinded the Jews. For else He would not have required them to give account thereof, forasmuch as He surely pardons involuntary offences. But the meaning is on this wise. It is just as though Isaiah were setting before us, as having been spoken by God, the words: "If I should become a Man, and with Mine own voice expound unto you what is profitable, not even so will ye hearken unto Me, as neither did ye hearken unto the prophets; neither, when ye see signs beyond description, will ye be profited aught by seeing them." This is really what "Ye will not see" means. For He did not say: "I will harden their hearts and blind their eyes;" but He said: "Although ye hear, ye will not hear; and though ye see, ye will not see, in order that ye may not be converted and I may heal you." For if they had heard and seen in such a way as they ought, they would surely have found benefit thereby. And so the passage contains no indication of an inevitable punishment, nor does it set forth a decree of One condemning and sentencing the Jews; but it is a prediction given with a good purpose. For He knew what manner of men they were going to become, and He made a declaration concerning them. Yet the saying does not go against all [the Jews], but only against the unbelieving; for many of them have believed. In this way therefore the Seventy have rendered the passage. But it is likely that the Evangelist followed the text of the Hebrews, which differs from that of the Seventy, and therefore said: For this cause they could not believe, because: He hath blinded them; and so far as the actual wording of the prophet goes, he has not said that "God" blinded them. And it is likely that some one else did this, in order that the Jews should not convert and find healing. But even though we should accept the supposition that God blinded them, yet it must be understood in this way;----that He allowed them to suffer blinding at the hands of the devil, when they were not good as regards their character. For in this way He gives up to a reprobate mind and to passion those who are of a disposition like theirs. But whilst they were such, it was not just that they should know the depth of the mystery and its secrets, seeing that they were men that kept not even the commandments of the Law. Whereas then they received neither the Law nor the ordinances of the Gospel, closing fast the eye of their understanding; on this account they receive not the instruction that is able to illuminate them.

That it was not God Who blinded the Jews. For else He would not have required them to give account thereof, forasmuch as He surely pardons involuntary offences. But the meaning is on this wise. It is just as though Isaiah were setting before us, as having been spoken by God, the words: "If I should become a Man, and with Mine own voice expound unto you what is profitable, not even so will ye hearken unto Me, as neither did ye hearken unto the prophets; neither, when ye see signs beyond description, will ye be profited aught by seeing them." This is really what "Ye will not see" means. For He did not say: "I will harden their hearts and blind their eyes;" but He said: "Although ye hear, ye will not hear; and though ye see, ye will not see, in order that ye may not be converted and I may heal you." For if they had heard and seen in such a way as they ought, they would surely have found benefit thereby. And so the passage contains no indication of an inevitable punishment, nor does it set forth a decree of One condemning and sentencing the Jews; but it is a prediction given with a good purpose. For He knew what manner of men they were going to become, and He made a declaration concerning them. Yet the saying does not go against all the Jews, but only against the unbelieving; for many of them have believed. In this way therefore the Seventy have rendered the passage. But it is likely that the Evangelist followed the text of the Hebrews, which differs from that of the Seventy, and therefore said: For this cause they could not believe, because: He hath blinded them; and so far as the actual wording of the prophet goes, he has not said that "God" blinded them. And it is likely that some one else did this, in order that the Jews should not convert and find healing. But even though we should accept the supposition that God blinded them, yet it must be understood in this way—that He allowed them to suffer blinding at the hands of the devil, when they were not good as regards their character. For in this way He gives up to a reprobate mind and to passion those who are of a disposition like theirs. But whilst they were such, it was not just that they should know the depth of the mystery and its secrets, seeing that they were men that kept not even the commandments of the Law. Whereas then they received neither the Law nor the ordinances of the Gospel, closing fast the eye of their understanding; on this account they receive not the instruction that is able to illuminate them.

When you hear that God blinded their eyes and hardened their heart, do not think that He simply makes some good and others evil (away with such a thought!), but by the complete blinding understand the abandonment by God.
I will explain with an example. Suppose someone is moderate in wickedness. God, it seems, is with him, because there is hope that such a person will turn back. But when a person plunges into the depths of wickedness, then God abandons him on account of his evil will. Of a person who has been deprived of the Divine light and walks in the darkness of sin, it is said that he walks as one who is blind; the absence of the Divine word, which softens the hearts of those who receive it, is called hardening of the heart. Already blinded is the one who completely refuses to receive the ray of Divine light, and hardened is the one who does not wish to hear the teaching that softens the heart, and God's withdrawal completely blinds and darkens him. So when you hear that God blinds, understand it in this way: He blinds because He is not present. For if God were present with a person, the person would not have become blind. If the sun were there, there would be no darkness. But now the sun produces night. In what way? By setting. So too God makes people blind by withdrawing from them. And He withdraws from them on account of their wickedness, and from that point on they, like blind men, sin irretrievably and fall incorrigibly.

He has blinded their eyes and hardened their heart: Isaiah 6: "Blind the heart of this people and make heavy their ears and shut their eyes" etc.: and Romans 1: "God gave them over to a reprobate mind." So that they may not see with their eyes nor understand with their heart and, by understanding, be converted, and, by converting, I may heal them; Jeremiah 3: "Return to me, and I will heal your backslidings."

Question I. But it is asked here first concerning what he says, that they could not believe, because Isaiah said: He has blinded, etc.

It seems first that he speaks incorrectly, because if they could not believe, then it was not to be imputed to them as sin.

To this Chrysostom responds: "They could not, that is, they would not."

But that does not resolve the matter: 1. because then it would be easy to resolve everything: why did the Evangelist not say "they would not," since he had it so readily at hand?

2. Likewise, granted that this were the meaning — they would not believe — because Isaiah says: He has blinded their eyes, then it seems that God is the cause of their evil will.

I respond: It must be said that something's not being able is said in two ways: either because it in no way can, or because it can only with great difficulty: thus it is said that a man accustomed to evil cannot do good; Jeremiah thirteen: "If the Ethiopian can change his skin, and the leopard his spots, so you can do good, when you have learned evil."

According to this way, it is said that a blinded man cannot believe; and the Evangelist means to say that they could not believe because they were blinded, as Isaiah had foretold — not that Isaiah's prediction was the cause, but rather their own malice and the divine judgment, namely the judgment of abandonment. Augustine: "God blinds and hardens by abandoning, not by assisting; which can happen by a hidden judgment, yet not an unjust one."

With these distinctions in mind, let us consider the words of this prophecy. It is found in Isaiah (6:10), not in these exact words, but with the same meaning. Three things are mentioned here: first, the hardening and blinding of the Jews; secondly, the effect of each of these; thirdly, their end.

In regard to the first, note that our Lord brought people to the faith in two ways, by his miracles and his teaching. And so he rebukes them on both points: "If I had not done among them the works which no one else did, they would not have sin" (15:24); and again in (15:22): "If I had not come and spoken to them, they would not have sin; but now they have no excuse for their sin." For they had derided both.

Insofar as they did not give due consideration to Christ's miracles, he says, he has blinded their eyes, that is, the eyes of their hearts, about which we read: "Having the eyes of your hearts enlightened" (Eph 1:18). For they should have understood that such miracles could only be done by divine power: "You see many things, but do not observe them" (Is 42:20); and again, "Who is blind but my servant? Or deaf, except he to whom I have sent my messengers?" (Is 42:19).

Because they were not moved by the teaching of Christ, he adds, and hardened their heart. That is very hard which is not melted by intense heat nor broken by divine blows. Now the words of Christ are "like fire, and like a hammer which breaks the rock in pieces" (Jer 23:29). Fire, indeed, because they inflame through love; and like a hammer because they terrify when they threaten, and break one by the revelation of the truth. And still the hearts of the Jews paid no attention to the words of Christ. Thus it is obvious that they were hardened: "His heart is hard as a stone" (Job 41:24); "He has mercy upon whomever he wills, and he hardens the heart of whomever he wills" (Rom 9:18).

The effect of their becoming blind is mentioned when he says, lest they should see with their eyes, that is, their spiritual eyes, and perceive the divinity of Christ: "They have eyes, but do not see" (Ps 115:5). In contrast, Luke says: "Blessed are the eyes which see what you see!" (Lk 10:23). The effect of their becoming hard of heart is mentioned when he says, lest they should perceive, understand, with their heart: "Because no one understands, they will perish forever" (Job 4:20); "He would not understand so that he might act well" (Ps 35:4). Here it should be noted that when he says, "lest they should see with their eyes and perceive with their heart," that is, "that they should not see with their eyes and perceive with their heart," the "that" does not indicate a cause, but merely the sequence of events.

The end of their becoming blind and hard in heart is given when he says, and turn for me to heal them. This can be understood in two ways, as Augustine says in his work, On Gospel Questions. In one way, so that both parts are negative, and then the meaning would be: "and they do not turn to me and I do not heal them." For the way of salvation from sin is to turn to God: "Restore us to thyself, O Lord, that we may be restored! Renew our days of old!" (Lam 5:21). But to those who prove themselves unworthy to have their sins forgiven, God does not offer the gifts by which they might turn to him and be healed, as is obvious in the case of the non-chosen.

The other interpretation is to regard only the first part as negative and then the meaning would be: they were blinded and hardened so they should not see or understand for a time, and so not seeing or understanding, that is, not believing in Christ, they would put him to death, but afterwards they would repent and turn to God and be healed. For now and then God permits us to fall into sin so that being humbled we may arise firmer in holiness.

Each of these interpretations is verified in the case of some of the Jews: the first one in those who persisted to the end in their unbelief, and the second one in those who turned to Christ after his passion, namely, those with remorse in their hearts at the words of Peter, and who said to the apostles: "Brethren, what shall we do?" as we read in the Acts (2:37).