It is the Spirit that quickeneth. By these words Christ shows the reason why the Jews did not profit by his doctrine to be, that, being spiritual and quickening, it does not find ears well prepared. But as this passage has been variously expounded, it will be of importance first to ascertain the natural meaning of the words; from which it will be easy to perceive Christ's intention. When he affirms that the flesh profiteth nothing, Chrysostom improperly, in my opinion, refers it to the Jews, who were carnal I readily acknowledge that in heavenly mysteries the whole power of the human mind is utterly unavailing; but the words of Christ do not bear that meaning, if they be not violently tortured. Equally forced would be that opinion, as applied to the apposite clause; namely, it is the illumination of the Spirit that quickeneth. Nor do I approve of the views of those who say, that the flesh of Christ profiteth, so far as he was crucified, but that, when it is eaten, it is of no advantage to us; for, on the contrary, we must eat it, that, having been crucified, it may profit Augustine thinks that we ought to supply the word only, or by itself, as if it had been said, "The flesh alone, and by itself, profiteth not," [1] because it must be accompanied by the Spirit This meaning accords well with the scope of the discourse, for Christ refers simply to the manner of eating. He does not, therefore, exclude every kind of usefulness, as if none could be obtained from his flesh; but he declares that, if it be separated from the Spirit, it will then be useless. For whence has the flesh power to quicken, but because it is spiritual? Accordingly, whoever confines his whole attention to the earthly nature of the flesh, will find in it nothing but what is dead; but they who shall raise their eyes to the power of the Spirit, which is diffused over the flesh, will learn from the actual effect and from the experience of faith, that it is not without reason that it is called quickening We now understand in what manner the flesh is truly food, and yet it profiteth not It is food, because by it life is procured for us, because in it God is reconciled to us, because in it we have all the parts of salvation accomplished. It profiteth not, if it be estimated by its origin and nature; for the seed of Abraham, which is in itself subject to death, does not bestow life, but receives from the Spirit its power to feed us; and, therefore, on our part also, that we may be truly nourished by it, we must bring the spiritual mouth of faith. As to the sentence breaking off in so abrupt a manner, it is probable that this was done because Christ saw that it was necessary to act in this manner towards unbelievers. By this clause, therefore, he suddenly closed the sermon, because they did not deserve that he should speak to them any longer. Yet he did not overlook those who are godly and teachable; for they have here, in a few words, what may abundantly satisfy them. The words which I speak to you. This is an allusion to the preceding statement, for he now employs the word Spirit in a different sense. But as he had spoken of the secret power of the Spirit, he elegantly applies this to his doctrine, because it is spiritual; for the word Spirit must be explained to mean spiritual Now the word is called spiritual, because it calls us upwards to seek Christ in his heavenly glory, through the guidance of the Spirit, by faith, and not by our carnal perception; for we know that of all that was said, nothing can be comprehended but by faith. And it is also worthy of observation, that he connects life with the Spirit He calls his word life, from its effect, as if he had called it quickening; but shows that it will not be quickening to any but those who receive it spiritually, for others will rather draw death from it. To the godly, this commendation bestowed on the Gospel is most delightful, because they are certain that it is appointed for their eternal salvation; but at the same time, they are reminded to labor to prove that they are genuine disciples.

Footnotes

1 - "Comme s'il estoit dit, La chair seule et par soy ne profite de rien."

It is the Spirit that quickeneth - These words have been understood in different ways. The word "Spirit," here, evidently does not refer to the Holy Spirit, for he adds, "The words that I speak unto you, they are spirit." He refers here, probably, to the doctrine which he had been teaching in opposition to their notions and desires. "My doctrine is spiritual; it is fitted to quicken and nourish the soul. It is from heaven. Your doctrine or your views are earthly, and may be called flesh, or fleshly, as pertaining only to the support of the body. You place a great value on the doctrine that Moses fed the body; yet that did not permanently profit, for your fathers are dead. You seek also food from me, but your views and desires are gross and earthly."
Quickeneth - Gives life. See the notes at John 5:21.
The flesh - Your carnal views and desires, and the literal understanding of my doctrine. By this Jesus shows them that he did not intend that his words should be taken literally.
Profiteth nothing - Would not avail to the real needs of man. The bread that Moses gave, the food which you seek, would not be of real value to man's highest wants.
They are spirit - They are spiritual. They are not to be understood literally, as if you were really to eat my flesh, but they are to be understood as denoting the need of that provision for the soul which God has made by my coming into the world.
Are life - Are fitted to produce or give life to the soul dead in sins.

It is the spirit that quickeneth - It is the spiritual sense only of my words that is to be attended to, and through which life is to be attained, 2-Corinthians 3:6. Such only as eat and drink what I have mentioned, in a spiritual sense, are to expect eternal life.
The flesh profiteth nothing - If ye could even eat my flesh and drink my blood, this would not avail for your salvation. These words contain a caution that the hearers should not understand his words in the strict literal sense, as if his body were really Bread, and as if his flesh and blood were really to be eaten and drank.
The words that I speak - Or, I have spoken. Instead of λαλω, I speak, I read λελαληκα, I have spoken, on the authority of BCDKLT, thirteen others; the Syriac, all the Arabic, all the Persic, Coptic, Ethiopic, Gothic, Slavonic, Vulgate, all the Itala; Origen, Eusebius, Athanasius, Basil, Cyril, Chrysostom, Tertullian, Ambrosias, Augustin, Gaudentius, and Vigilius Taps. This is an important reading, and plainly shows that our Lord's words here do not refer to any new point of doctrine which he was then inculcating, but to what he had spoken concerning his being the living bread, and concerning the eating of his flesh, and drinking of his blood, in the preceding verses.
Are spirit, and they are life - As my words are to be spiritually understood, so the life they promise is of a spiritual nature: see Bishop Pearce.

(14) It is the (x) spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, [they] are spirit, and [they] are life.
(14) The flesh of Christ therefore quickens us, because he that is man is God: and this mystery is only comprehended by faith, which is the gift of God, found only in the elect.
(x) Spirit, that is, that power which flows from the Godhead causes the flesh of Christ (which is otherwise nothing but flesh) both to live in itself and to give life to us.

It is the Spirit that quickeneth,.... It is the spirit of man that quickens him; or which being breathed into him, he becomes a living soul; for the body, without the spirit, is dead; it is a lifeless lump: and it is the Spirit of God that quickens dead sinners, by entering into them as the spirit of life, and causing them to live: and it is spiritual eating, or eating the flesh, and drinking the blood of Christ in a spiritual sense, which quickens, refreshes, and comforts the minds of believers; it is that by, and on which they live, and by which their spiritual strength is renewed: unless, by spirit, is meant the divine nature of Christ, by which he was quickened and raised from the dead, and ascended up into heaven, and was declared to be the Son of God with power:
the flesh profiteth nothing; the human nature of Christ, though profitable, as in union with the Son of God, to be given for the life of his people, and to be an offering, and a sacrifice for their sins, yet not as alone, or as abstracted from the divine nature; nor would his flesh and blood, corporeally eaten, could, or should it be done, be of any avail to eternal life; nor is any other flesh, literally understood, profitable of itself for life; for man lives not by bread, or meat, or flesh alone, but by the word and blessing of God upon it, and along with it; nor flesh, in a figurative sense, as creature acts and performances, self-righteousness, obedience to the ceremonial law, carnal descent, and birth privileges:
the words that I speak unto you, they are spirit, and they are life; the doctrines which Christ had then been delivering concerning himself, his flesh and blood, being spiritually understood, are the means of quickening souls. The Gospel, and the truths of it, which are the wholesome words of our Lord Jesus Christ, are the means of conveying the Spirit of God, as a spirit of illumination and sanctification, into the hearts of men, and of quickening sinners dead in trespasses and sins: the Gospel is the Spirit that giveth life, and is the savour of life unto life, when it comes not in word only, or in the bare ministry of it, but with the energy of the Holy Ghost, and the power of divine grace.

the flesh profiteth nothing--Much of His discourse was about "flesh"; but flesh as such, mere flesh, could profit nothing, much less impart that life which the Holy Spirit alone communicates to the soul.
the words that I speak . . . are spirit and . . . life--The whole burden of the discourse is "spirit," not mere flesh, and "life" in its highest, not its lowest sense, and the words I have employed are to be interpreted solely in that sense.

It is the spirit that quickeneth. We may paraphrase this verse thus: I shall ascend to heaven so that my body cannot be literally eaten; the flesh literally profits nothing. It is the spirit that makes alive. The spirits of men must feed upon me by faith, that they may be made alive. My words are spirit and life. He who feeds upon them will be made alive.

It is the Spirit - The spiritual meaning of these words, by which God giveth life. The flesh - The bare, carnal, literal meaning, profiteth nothing. The words which I have spoken, they are spirit - Are to be taken in a spiritual sense and, when they are so understood, they are life - That is, a means of spiritual life to the hearers.