Jesus therefore said to them: When you shall have lifted up the Son of man, then shall you know, that I am he, and that I do nothing of myself, but as the Father hath taught me, these things I speak:

“(Hom. liii. 1, 2) Or the connection is this: When His miracles and teaching had failed to convert men, He spoke of the cross; When ye have lifted up the Son of man, then ye shall know that I am He: as if to say, Ye think that ye have killed Me; but I say that ye shall then, by the evidence of miracles, of My resurrection, and your captivity, know most especially, that I am Christ the Son of God, and that I do not act in opposition to God; But that as My Father hath taught Me, I speak these things. Here He shews the likeness of His substance to the Father’s; and that He says nothing beyond the Paternal intelligence. If I were contrary to God, I should not have moved His anger so much against those who did not hear Me.”

“(Tract. xl. 2) When our Lord said, He is true that sent Me, the Jews did not understand that He spake to them of the Father. But He saw some there, who, He knew, would believe on Him after His passion. Then said Jesus unto them, When ye have lifted up the Son of man, then ye shall know that I am. (Exod. 3:14) Recollect the words, I am that I am, and ye will know why I say, I am. I pass over your knowledge, in order that I may fulfil My passion. In your appointed time ye will know who I am; when ye have lifted up the Son of man. He means the lifting up of the cross; for He was lifted up on the cross, when He hung thereon. This was to be accomplished by the hands of those who should afterwards believe, whom He is now speaking to; with what intent, but that no one, however great his wickedness and consciousness of guilt might despair, seeing even the murderers of our Lord forgiven.”

“After the Lord had manifested concerning himself the privilege of light, here he consequently manifests the effect of light, namely that it frees from darkness; and first he shows that they themselves are held fast in darkness; second he teaches the remedy by which they may be freed from it, at the place, "The Jews therefore said, Will he kill himself?" and so on. Concerning the first he does three things. First the Lord announces his own departure; second he shows the perverse zeal of the Jews; third, their failure. Now the Lord says that his departure is through death; and therefore he says "I go," in which he gives two things to understand. First, that he dies voluntarily, namely as one going, and not led by another. Below, John 16:5: "I go to him who sent me"; below, John 10:18: "No one takes my soul from me, but I lay it down of myself." And according to this it is rightly continued from what precedes. For he had said: "No one laid hold of him," and so on. And why? Because of himself he goes spontaneously. Second, he shows that the death of Christ was a certain advancing to that place whence he had come and whence he had not departed; for just as one who goes forward makes progress, so Christ through death arrived at the glory of exaltation. Philippians 2:8: "He became obedient unto death, even the death of the cross; for which cause God also exalted him"; below, John 13:3: "Knowing that he came forth from God, and goes to God." He shows their perverse zeal in the deceitful seeking of Christ; and as to this he says, "You will seek me." Now some seek Christ devoutly out of charity; and this seeking is followed by life; Psalm 68:33: "Seek the Lord, and your soul shall live." But these seek impiously, and out of hatred, in order to persecute; Psalm 37:13: "They that sought my soul used violence." And thus he says "you will seek me," namely persecuting, after his death indeed with infamy; Matthew 27:63: "We have remembered that that deceiver said, while yet alive, After three days I will rise again." Likewise in my members; Acts 9:4: "Saul, Saul, why do you persecute me?" And death follows upon this pursuit; and therefore he adds their failure, which he foretells to them, saying, "And you shall die in your sin"; and first he foretells the failure which consists in the condemnation of death; second, the failure which consists in their exclusion from glory, at the place, "Where I go, you cannot come." He says therefore: because you seek me unjustly, therefore "in your sin," that is, remaining in it, "you shall die." This can be understood in one way of bodily death; and thus he dies in his sins who perseveres in them right up until death. And thus by saying "you shall die in your sin" he aggravates their obstinate persistence. Jeremiah 8:6: "There is none that does penance for his sin, saying, What have I done?"; Ezekiel 32:27: "They are gone down to hell with their weapons." In another way, of the death of sin, of which it is said in Psalm 33:21: "The death of the wicked is very evil." And just as bodily death is preceded by infirmity of the body, so also this death is preceded by a certain infirmity. For as long as sin is remediable, then it is as it were a certain infirmity that precedes; Psalm 6:3: "Have mercy on me, O Lord, for I am weak." But when it is irremediable, either absolutely, as after this life, or with respect to itself, as is the sin against the Holy Spirit, then it causes death; 1 John 5:16: "There is a sin unto death; I do not say that anyone should pray for that." And accordingly the Lord foretells to them that the infirmity of sinners is unto death. He shows the failure which consists in their exclusion from glory when he says, "Where I go, you cannot come." Where the Lord goes, these also go through death; but the Lord without sin, while these indeed with sins, since they die in their sin, and therefore they do not arrive at the glory of the vision of the Father. And therefore he says, "Where I go" — namely, spontaneously through my passion, namely to the Father and to his glory — "you cannot come," because you do not will to. For if they had willed it and had not been able, it would not reasonably be said to them, "You shall die in your sin." But it must be noted that some are hindered from being able to go where Christ goes, in two ways. In one way by reason of contrariety, and thus sinners are hindered; and of this he speaks here; and therefore to those simply persevering in sin he says, "Where I go, you cannot come." Psalm 100:7: "He that works pride shall not dwell in the midst of my house"; Isaiah 35:8: "It shall be called the holy way, and the polluted shall not pass through it"; Psalm 14:1: "Who shall dwell in your tabernacle? He that is innocent in hands and clean of heart." In another way by reason of imperfection, or lack of disposition; and in this way the just are hindered as long as they are in the body; 2 Corinthians 5:6: "As long as we are in the body, we are pilgrims away from the Lord." And to such the Lord does not say simply, "Where I go, you cannot come," but adds a qualification of time; below, John 13:37: "Where I go, you cannot follow me now." Next, when he says "The Jews therefore said," and so on, he deals with the remedy by which they may be freed from darkness, and first he proposes the remedy for escaping the darkness; second he adduces reasons for obtaining this remedy, at the place, "They said therefore to him, Who are you?" Third, he foretells the manner of arriving at this, at the place, "Jesus therefore said to them: When you shall have lifted up the Son of man, then you shall know." Concerning the first he does two things. First is set forth the occasion of Christ's words; second are set forth those things by which the intimation of the remedy is caused, at the place, "You are from beneath." Now the occasion of Christ's words is taken from the person, or the understanding, of the Jews. For since they were carnal, they understood in a carnal way the Lord's words which he had spoken, "Where I go, you cannot come"; 1 Corinthians 2:14: "The natural man does not perceive the things that are of the Spirit of God." Hence the Jews say, "Will he kill himself?" Which indeed, according to Augustine, is a foolish opinion. For could they not have come where Christ went, if he were to kill himself? They too could indeed kill themselves. Thus therefore death was not the terminus to which Christ was about to go, but the way by which he was going to the Father. Hence he did not say that they could not go to death, but that through death they could not go to the place to which Christ was exalted through it, namely to the right hand of God. According to Origen, however, perhaps not without cause do the Jews say this. For they had from the traditions that the Christ would die voluntarily, just as he himself said, below, John 10:18: "No one takes my soul, but I lay it down of myself." Which they seem to have had especially from Isaiah 53:12: "Because he has delivered his soul unto death, therefore I will divide him a portion with many, and he shall divide the spoils of the strong." Because therefore they had some suspicion concerning Jesus that he was the Christ, therefore, when he said "I go," and so on, they introduced this opinion, that he would voluntarily hand himself over to death. But they utter this insultingly, saying, "Will he kill himself?" Otherwise they would have said: "Will his soul, when it shall please him, go forth, the body being left behind?" — which we cannot do. And on account of this he says, "Where I go, you cannot come." Next, when he says, "You are from beneath," and so on, he proposes the remedy for escaping the darkness, and first he sets forth beforehand his own origin and theirs; second from this he concludes his proposition, at the place, "I said therefore to you," and so on. Now concerning the first he differentiates his own origin from their origin in two ways. First, because he is from above, and they from beneath. Second, because they are of this world, of which Christ is not. But, as Origen says, it is one thing to be "from beneath," and another to be "of this world"; for "above" and "beneath" are differences of place. Lest, therefore, from his saying that he is "from above" they should understand him to be from the upper part of this world, therefore, excluding this, he says that he is not "of this world." As if he were to say: I am so much "from above," that nevertheless I am wholly above this whole world. And indeed that they are of this world and from beneath is manifest; but that Christ is from above, and not of this world, truly requires understanding. For certain ones, holding that all visible created things were made by the Devil, as the Manichaeans, said that Christ, even as to his body, was not of this visible world, but of a world of another creation, namely the invisible one. Valentinus also, wrongly taking this up, said that Christ had brought a heavenly body. That this, however, is not the true understanding here appears, because the Lord says to the apostles themselves, below, John 15:19: "You are not of this world." It must be said, therefore, that it can be understood of Christ the Son of God, and of Christ the man. For Christ, insofar as he is the Son of God, is from above; below, John 16:28: "I came forth from the Father, and came into the world." And likewise he is not of this sensible world, that is, the one which consists in sensible things, but of the intelligible world, which is in the mind of God, since he is the very Word of God, insofar as he is the highest wisdom. For all things were made in wisdom. Hence it is said of him above, John 1:10: "The world was made through him." But insofar as he is man, Christ is from above, because he did not have his affection set on worldly and lowly things, but on higher things, among which the soul of Christ had its dwelling, according to that saying of Philippians 3:20: "Our conversation is in heaven"; Matthew 6:21: "Where your treasure is, there is your heart also." And conversely, these who are from beneath have a lowly origin, and are of this world, because they have their affection set on earthly things; 1 Corinthians 15:47: "The first man was of the earth, earthly." Next, when he says, "I said therefore to you, that you shall die in your sins," he concludes his proposition, and first he makes clear what he had said about their failure; second he shows them the remedy, at the place, "For if you believe not," and so on. Now it must be known concerning the first that each thing, in its progress, follows the condition of its origin; hence those things which have a lowly origin, if left to themselves, naturally tend downward. And nothing naturally tends upward except what has a higher origin; above, John 3:13: "No one ascends into heaven, but he that descended from heaven." The Lord therefore says: this is the reason why you cannot come where I go, because since you are from beneath, as far as it is in you, you cannot but fall; and therefore what I said, that you shall die in your sins, is true, unless you cling to me. And therefore, so as not totally to exclude the hope of salvation, he sets forth a remedy, saying, "For if you believe not that I am, you shall die in your sin"; as if he were to say: you were born in original sin, from which you cannot be absolved except through faith in me, because if you do not believe that I am, you shall die in your sin. And he says "I am," but not what he is, so as to call to mind what was said to Moses, Exodus 3:14: "I am who am"; for being itself is proper to God. For in every other nature besides the divine, being and that-which-is differ, since every created nature participates its being from that which is being through essence, namely God himself, who is his own very being, such that his being is his essence. Hence he alone is named from it. And therefore he says, "Unless you believe that I am" — that is, that I am truly God, who has being through essence — "you shall die in your sin." For he says "that I am," to show his eternity. For in all things that begin there is a certain mutability, and some potency toward non-being, whence there is found in them a certain past and future; and therefore there is not there true being through itself. But in God there is no potency toward non-being, nor did his being begin; and therefore he is being itself, which is properly designated by the present tense. Next, when he says, "They said therefore to him, Who are you?" he sets forth reasons leading to faith, and first is set forth the interrogation of the Jews; second, the response of Christ, at the place, "Jesus said to them: The beginning, who also speak to you"; third, the blinding of their understanding, at the place, "And they understood not," and so on. For because the Lord had said, "Unless you believe that I am," it still remained to ask who he was; and therefore they said to him, "Who are you?" As if they were to say: whence are you, that we should have to believe you? And therefore next, when he says, "The beginning, who also speak to you," he answers, leading them to belief, first from the sublimity of his nature; second from his judiciary power, at the place, "I have many things to speak and to judge of you"; third from the truthfulness of the Father, at the place, "But he that sent me is true." What leads them to believe Christ indeed is the sublimity of his nature, because he himself is the beginning. Hence Jesus said to them: "The beginning, who also speak to you." "Principium" ["beginning"] in Latin is of neuter gender; hence it is doubtful whether it is here of the nominative or the accusative case. But in Greek it is of feminine gender, and in this place it is of the accusative case. Hence, according to Augustine, it should not be read: "I am the beginning," but rather: "Believe me to be the beginning, lest you die in your sins." The Father, too, is called "beginning." And in one way indeed the name "beginning" is common to the Father and the Son, inasmuch as they are one beginning of the Holy Spirit through common spiration; and the three persons together are the beginning of the creature through creation. In another way it is proper to the Father, inasmuch as the Father is the beginning of the Son through eternal generation. We do not, however, speak of several beginnings, just as we do not speak of several gods; Psalm 109:3: "With you is the principality in the day of your strength," and so on. Here, however, the Lord says he is the beginning with respect to the whole creature; for that which is such through essence is the beginning and cause of those things which are such through participation. Now to be through essence, as has been said, is to be his own being. But because Christ has in himself not only the divine nature, but also the human, therefore he adds "who also speak to you"; for man cannot immediately bear the voice of God, because, according to Augustine, weak hearts cannot hear the intelligible word without a sensible voice. Exodus 20: "What is man, that he should hear the voice of the Lord his God?" Therefore, so that we might hear the divine Word itself immediately, he took on flesh, by whose instrument he spoke to us; hence he says "who also speak to you"; that is, having been made lowly for your sake, I have come down to these words. Hebrews 1:1: "God, who at sundry times and in divers manners spoke in times past to the fathers by the prophets, last of all has spoken to us by his Son"; above, John 1:18: "The only-begotten, who is in the bosom of the Father, he himself will make [it] known to you." Or otherwise, according to Chrysostom, so that by saying "the beginning, who also speak to you" he might reprove the slowness of understanding of the Jews. For after the many signs which they had seen done by him, still hardened, they ask the Lord, "Who are you?" and so on. And therefore Jesus answered, "I am the beginning," that is, who have spoken to you from the beginning; as if he were to say: you have no need still to ask who I am, since it ought already to be manifest. Hebrews 5:12: "Whereas for the time you ought to be masters, you have need to be taught again what are the first elements of the words of God." Second, his judiciary authority leads them to believe Christ; and therefore he adds, "I have many things to speak and to judge of you"; as if he were to say: I have the authority to judge you. But it must be known that it is one thing to speak to us, and another to speak of us. For Christ speaks to us for our benefit, namely so as to draw us to himself; and thus he speaks to us, while we live, by preaching, inspiring, and doing such things. But he speaks of us not for our benefit, but to show his own justice; and in this way he will speak of us in the future judgment. But on the contrary. Above, John 3:17: "For God did not send his Son into the world to judge the world, but that the world may be saved through him." Response. It must be said that it is one thing to judge, and another to have the power to judge. "To judge" denotes the act of judgment; and this does not pertain to the first coming of the Lord, as he said above: "I judge no one" — namely, for the present. But "to have the power to judge" denotes the power of judgment; and this Christ has; above, John 5:22: "The Father has given all judgment to the Son"; Acts 10:42: "It is he who was appointed by God to be judge of the living and the dead." And therefore he says pointedly, "I have many things to speak and to judge of you" — but in the future judgment. The truthfulness of the Father also leads to belief in Christ; and as to this he says, "But he who sent me is true"; as if he were to say: the Father is true; but I speak things consonant with him; therefore I speak true things; therefore you ought to believe me. He says therefore, "he who sent me" — namely the Father — "is true," not by participation, but by the very essence of truth; otherwise, since the Son is truth itself, he would be greater than the Father; Romans 3:4: "But God is true." "And I speak the things which I have heard from him": not by human hearing, but through eternal generation I received them, these I speak. Isaiah 21:10: "The things which I have heard from the Lord of hosts, the God of Israel, I have declared to you"; above, John 5:19: "The Son cannot do anything of himself." Now this saying, "He that sent me is true," is connected to what precedes in two ways. In one way thus: I say that I have to judge concerning you. But my judgment will be true, because he who sent me is true. Romans 2:2: "The judgment of God is according to truth." In another way, according to Chrysostom: I say that I have to judge concerning you; but I defer this, not out of powerlessness, but so as to obey the will of the Father; for he who sent me is true. Hence, since he had promised a savior and a defender, he sent me now to save; and I, because I speak only the things which I have heard from him, therefore speak to you things salutary. Next, when he says, "And they understood not that he called God his Father," he reproves the slowness of their understanding; for they did not yet have the eyes of the heart open, by which they might understand the equality of Father and Son, and this because they were carnal; 1 Corinthians 2:14: "The natural man does not perceive the things that are of the Spirit of God." Here first Christ foretells by what means they ought to arrive at faith, which is the remedy against death; and concerning this he does two things. First he shows by what they are to come to faith; second he teaches what is to be believed concerning himself, at the place, "That I am." He says therefore first that they ought to arrive at faith through his passion. Hence Jesus said to them: "When you shall have lifted up the Son of man, then you shall know"; as if he were to say: now you do not know that my Father is God; but "when you shall have lifted up the Son of man," that is, when you shall have fastened me to the wood of the cross, "then you shall know" — namely, some of you, through faith; below, John 12:32: "I, if I be lifted up from the earth, will draw all things to myself." Now the reason, according to Augustine, that he calls to mind the passion of the cross is so as to give hope to sinners, namely so that no one, however conscious of guilt from whatever crime, might despair, since those who crucified Christ are themselves freed from sins through the blood of Christ. For there is no one so great a sinner that he cannot be freed through the blood of Christ. Or, according to Chrysostom, "when you shall have lifted up the Son of man" — namely on the cross — "then you shall know," that is, you will be able to know what sort I am, not only through the glory of my resurrection, but also through the punishment of your captivity and destruction. Now as to the second, he teaches three things to be believed concerning himself. First, the majesty of his divinity; second, his origin from the Father; third, his inseparability from the Father. The majesty of his divinity indeed, when he says "that I am"; that is, I have in me the nature of God, and I am he who spoke to Moses, saying: "I am who am." But because the whole Trinity pertains to being itself, therefore, lest the distinction of persons be excluded, he next teaches that his origin from the Father is to be believed, when he says, "And of myself I do nothing; but as the Father has taught me, these things I speak." But because Jesus began to do and to teach, therefore he designates his origin from the Father in two respects: namely in the things which he does, whence he says, "And of myself I do nothing" (above, John 5:19: "The Son cannot do anything of himself"), and in the things which he teaches, whence he says, "But as the Father has taught me"; that is, he handed on knowledge by begetting me knowing. For since the nature of truth is simple, for the Son to be is the same as to know; and thus just as the Father, by begetting, gave the Son that he might be, so by begetting he gave him that he might know; above, John 7:16: "My doctrine is not mine." And lest it be understood that he was sent by the Father as though distinct from him, therefore third he teaches that his inseparability from the Father is to be believed, when he says, "And he who sent me" — namely the Father — "is with me," through unity of essence; below, John 14:10: "I am in the Father, and the Father is in me." Likewise through the conjunction of love; above, John 5:20: "The Father loves the Son, and shows him all things that he himself does." And thus the Father sent the Son in such a way that he did not depart from him. Hence it follows, "and he has not left me alone," because his affection is fixed upon me. But although both are together, nevertheless one was sent, and the other sent: because the mission is the incarnation, which indeed belongs to the Son alone, and not to the Father. Now that he has not left me is evident from a sign, "because I do always the things that are pleasing to him"; which indeed is set down not as a meritorious cause, but as a sign; as if he were to say: this very fact, that I always do, without beginning, without end, the things that are pleasing to him, is a sign that he is always with me, and has not left me; Proverbs 8:30: "I was with him forming all things." Or otherwise: "he has not left me," that is, as man, by protecting me, because I always do the things that are pleasing to him. And according to this he states a meritorious cause. Next, when he says, "As he spoke these things, many believed in him," the effect of his teaching is set forth, which is the conversion of many to faith from hearing the teaching of Christ; Romans 10:17: "Faith then comes by hearing; and hearing by the word of Christ."”

“Then said Jesus to those Jews that believed on him,.... For he knew instantly who they were, and when they believed on him; and therefore he immediately turned himself to them, and thus addressed them; if ye continue in my word; meaning the Gospel, called his, because he was both the author, and preacher, and sum, and substance of it: and to continue in it, is having cordially received it, to abide by it, and hold it fast, and not to be moved from it, by the temptations of Satan; the cunning of those that lie in wait to deceive; nor by the revilings and persecutions, the frowns and flatteries of men: and when men continue thus steadfast in it, and faithful to it, it is an evidence that it has come with power, and has a place in their hearts, and that they are the true followers of Christ: then are ye my disciples indeed; there are two sorts of disciples of Christ; some are only nominal, and merely in profession such; and these sometimes draw back from him, discontinue in his word, and go out from among his people; which shows that they never were of them, nor are the true disciples of Jesus; for the genuine disciples of Christ continue in his Gospel, hold fast to him, the head, and remain with his people; which to do to the end, is an evidence, of their being disciples indeed.”

“When ye have lifted up - When ye have crucified me, and thus filled up the measure of your iniquities, ye shall know that I am the Christ, by the signs that shall follow; and ye shall know that what I spoke is true, by the judgments that shall follow. To be lifted up, is a common mode of expression, among the Jewish writers, for to die, or to be killed.”