The interpretation timeline
Isaiah 40:6 Douay-Rheims

The voice of one, saying: Cry. And I said: What shall I cry? All flesh is grass, and all the glory thereof as the flower of the held.

A.D. 373 – 1875 12 witnesses 15 excerpts

Patristic

before A.D. 750
373
A.D.
c. A.D. 296–373
“What advancement, then, was it to the Immortal to have assumed the mortal? Or what promotion is it to the Everlasting to have put on the temporal? What reward can be great to the everlasting God and King in the bosom of the Father? Do you not see that this too was done and written because of us and for us, that the Lord, having become a human being, might make immortal us who are mortal and temporal and bring us into the everlasting kingdom of heaven? Do you Arians not blush, speaking lies against the divine oracles? For when our Lord Jesus Christ was among us, we indeed were promoted, as rescued from sin; but he is the same, nor did he change when he became man, but, as has been written, "the Word of God abides forever." Surely as, before he became human, he, the Word, dispensed to the saints the Spirit as his own, so also when made human, he sanctifies all by the Spirit and says to his disciples, "Receive the Holy Spirit."”
Source
379
A.D.
Basil of Caesarea Patristic
c. A.D. 330–379
“"The voice of the Lord is on the waters." In many places you might find the word voice occurring. Therefore, for the sake of understanding what the voice of the Lord is, we should gather, as far as we are able, from the divine Scripture what has been said about the voice; for instance, in the divine warning to Abraham: "And immediately the voice came to him: He shall not be your heir." And in Moses: "And all the people saw the voice and the flames." Again in Isaiah: "The voice of one saying, Cry." With us, then, voice is either air that has been struck or some form that is in the air against which he who is crying out wishes to strike. Now, what is the voice of the Lord? Would it be considered the impact on the air? Or air, which has been struck reaching the hearing of him to whom the voice comes? Or neither of these but that this is a voice of another kind, namely, an image formed by the mind of people whom God wishes to hear his own voice, so that they have this representation corresponding to that which frequently occurs in their dreams? Indeed, just as, although the air is not struck, we keep some recollection of certain words and sounds occurring in our dreams, not receiving the voice through our hearing but through the impression on our heart itself, so also we must believe that some such voice from God appeared in the prophets.”
Source
“I want the marvel of creation to gain such complete acceptance from you that, wherever you may be found and whatever kind of plants you may chance on, you may receive a clear reminder of the Creator. First, then, whenever you see a grassy plant or a flower, think of human nature, remembering the comparison of the wise Isaiah, that "all flesh is as grass, and all the glory of humanity as the flower of the grass." For the short span of life and the briefly enduring pleasure and joy of human happiness have found a most apt comparison in the words of the prophet. Today he is vigorous in body, grown fleshy from delicacies, with a flowerlike complexion, in the prime of life, fresh and eager, and irresistible in attack. Tomorrow that same one is piteous or wasted with age or weakened by disease.”
Source
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“Wonder not that you will be a sharer of [Christ's] eternity. For he first became a sharer of your flesh, which is like grass. Will he who assumed from you what was lowly deny to you what is exalted with respect to you?… How great, then, is the hope of the grass since the Word has been made flesh? He who abides forever has not disdained to assume grass, that the grass might not despair of itself.”
Source
“So those flourishing, wicked people are like grass, sprouting in winter, drying up in summer. Take care that you, though, fix your roots in the Word of God, which abides forever, and that you are a tree living in a hidden way. "For you are dead, and your life is hidden with Christ in God." That is where your root is; that is where you are alive. That, you see, is where you have placed your hope.… So do not let the winter time get you down. In the winter many prolific fruit trees lack the ornament of leaves and without the grace of fruit are like withered trees, and yet they are not in fact withered. When the grass is flourishing, they haven't even got leaves … the summer is the judge … the sun of justice is the judge.”
Source
“Both what is being thought of by intelligence and what is sounding out loud in speech is changeable and dissimilar. The first will not remain when you have forgotten it, nor will the second when you stop speaking. But "the Word of the Lord remains forever" and abides unchanged and unchangeable.”
523
A.D.
c. A.D. 450–523
“And again in another place the same prophet saith, "He said to me, Cry. And I said, What shall I cry? All flesh is grass, and all the glory thereof is like the grass of the field". Yea, "like the grass" and like the herb which drieth up before the sun, which when once its natural juiciness and moisture have dried up neither the rain nor all the watering of the fountains can make grow green again, even so became the nation which was dead to all the vivification of the Spirit, and like grass and straw it became dry and withered by reason of the noonday heat of error, and by the hotness of evil things. The soul dieth without the remembrance of God, and when it dieth all its discretion dieth therewith, and all its emotions of thought of heavenly things are annihilated therefrom.”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“A voice from the Holy One, blessed be He, says to me, “Call!” and it says My spirit says to Him, “What shall I call?” And the voice answers him, “Call this, all flesh is grass. All those who are haughty their greatness shall be turned over and become like grass. ([Manuscripts yield:] All the princes of the kingdom their greatness shall be turned over and shall wither away [lit. shall end] like grass.) and all its kindness is like the blossom of the field For “the kindness of the nations is sin” (Prov. 14:34). [Ed. note: We have inverted the order of Rashi and followed the order of K’li Paz and Parshandatha, to connect the second part of the verse with the first. Rashi’s explanation of the second part follows his first explanation of the first part. In the Lublin edition, the second explanation of the first part of the verse interrupts the sequence.] (Another explanation is: All flesh is grass.) A person’s end is to die; therefore, if he says to do kindness, he is like the blossom of the field, that is cut off and dries, and one must not rely on him, for he has no power to fulfill his promise, perhaps he will die, for, just as the grass dries out and the blossom wilts, so is it that when a man dies, his promise is null, but the word of our God shall last for He is living and existing, and He has the power to fulfill. Therefore, “Upon a lofty mountain ascend and herald, O herald of Zion, for the promise of the tidings emanates from the mouth of Him Who lives forever.””
Source
1167
A.D.
Ibn Ezra Jewish
1089–1167
“The voice said, etc. This verse explains the glory of the Lord to consist in the fact that His word alone is fulfilled, not so the word of man. The voice. The angel. Said unto the prophet. כחציר=חציר Like grass. Comp. כשמש=שמש as sun (Ps. 84:12). As the flower of the field, which flourisheth in the morning and groweth up, but is cut down and withereth in the evening (Ps. 90:6)”
Source
1256
A.D.
Thomas Aquinas Catholic
1225–1274
“1 Be comforted, be comforted, and so forth. This is the second principal part of this book, in which he mainly intends the consolation of the people through many promised benefits. It is divided into two parts. In the first he leads them to the expectation of the things promised; in the second he carries out the promise of the divine benefits, below, chapter 45: "Thus says the Lord to my anointed," and so forth. The first is divided into three: in the first he comforts them through the power of the one promising; in the second through his love, chapter 41: "let them keep silence before me," etc.; in the third through the weakness of the idols, which might be believed able to resist, chapter 44: "and now hear, Jacob," and so forth. Concerning the first he does three things. First he leads them to consolation; second he promises a comforter, "the voice of one crying," etc.; in the third he shows the power of God who consoles, "who has measured with the fist," and so forth. Concerning the first, three things. First he leads the people into consolation: "be comforted," in spiritual things, "be comforted," in temporal goods granted. Ecclesiasticus 48: "he comforted," etc., Zechariah 1: "the Lord answered the angel," and so forth. Second he enjoins on the prophets and priests the announcement of consolation: "speak to the heart," namely by consoling; "call," away from sadness, away from idolatry. Hosea 2: "I will lead her into the wilderness." Third he assigns the reason: as to the remission of guilt, "for it is completed," etc., above chapter 27: "and here all the fruit," etc.; as to the ending of punishments, "she has received," etc. — he speaks according to the time after the captivity. Jeremiah 17: "with double destruction," etc. But on the contrary: Nahum 1: "a double tribulation shall not arise." And it must be said that they are called double as to the punishment of body and soul, just as guilt too is in both. "The voice of one crying," and so forth. Here he promises a comforter; and concerning this he does three things. First he sets forth the preparation; second he shows the firmness of the prophecy, "the voice of one saying," etc.; third he foretells the comforter to come, "upon a mountain," and so forth. Concerning the first, three things. First he enjoins the preparation: "the voice of one crying in the wilderness," namely of John the Baptist: this it will be, "prepare," through conversion from evils, "in the wilderness," of vices. Amos 4: "prepare to meet your God," and so forth. Second he foretells the fulfillment, "every valley," following the metaphor of a bad road: if it is mountainous, it causes toil — hence he says, the valley shall be exalted, so that it may be made level with the mountains, and the whole made plain; if it is crooked it causes wandering, and as to this he says, "crooked things shall be," etc.; if it is stony it causes pain to the feet, and as to this: "rough things into ways," by which is signified that faintheartedness will be turned into security, pride into humility, wickedness into uprightness, and cruelty into gentleness. Jeremiah 31: "direct your heart into the way," and so forth. Third he shows the usefulness of the preparation, "and the glory shall be revealed," that is, the Son. Jeremiah 33: "I will heal them," etc.; "shall see" — that is, he will show himself visible to all. Or he speaks of the day of judgment. Apocalypse 1: "every eye shall see him, and they who," and so forth. Some explain it thus. "The voice," of God, "crying," this is it, "prepare in the wilderness," that is, in the land of Judah, once a wasteland, "the way of the Lord," namely for going to the temple, or in the wilderness that is between Babylon and Judah. "Every valley." By these words it is shown that all obstacles are removed, so that the people may return freely. "Glory," in the destruction of the Chaldeans, through which he will appear glorious. "The voice of one saying." In this part he shows the firmness of the prophecy, by comparison to human frailty: hence the Lord first enjoins the cry, which signifies an express and plain announcement. "Cry out." Below, chapter 58: "cry, cease not," etc.; second he enjoins the human frailty that is to be cried out, the prophet asking, "and I said, what shall I cry?" — fearing lest he be commanded to cry out something against his own people, as above chapter 6; and the Lord answering, "all flesh," and so forth. James 1: "for the sun has risen," etc.; third he shows the firmness of the divine word, "surely the grass," etc., Luke 21: "heaven and earth," and so forth. "Upon a high mountain," and so forth. Here he foretells the comforter to come; and concerning this he does three things. First the Lord enjoins upon the prophet the announcement; in the second he sets forth the promise of the coming, "behold, God"; in the third he shows the condition of the one coming, "behold the Lord." Concerning the first he determines who, to whom, and how he is to announce. Who: because it is the one who has the office, "you who bring good tidings." Romans 10: "how shall they preach, unless," and so forth. He designates the manner through three things. Through the height of the place, so that, announcing good things, he may be heard from far off, "upon a mountain," etc. — mystically, Christ, or heavenly conversation and contemplation. Above chapter 2: "come, let us ascend," etc., below chapter 42: "from the top of the mountains," etc.; through the loudness of the voice, "lift it up with strength," so that many may hear, by preaching plainly and steadfastly. Below chapter 58: "cry, cease not," etc.; through the security of the heart, "lift it up, do not," and so forth. Jeremiah 1: "be not afraid before the face," and so forth. To whom it is to be announced he determines as to three things: as to the province of the kingdom, "say to the cities," etc.; as to the metropolis of the province, "you who bring good tidings to Jerusalem"; as to the rulers of the city, "Zion," where the temple and the royal house were. Below chapter 41: "the first shall say to Zion," and so forth. Acts 13: "it was necessary that to you," and so forth. "Behold." Here he sets down the promise of God's coming, "behold," at hand, "your God" — "he will come." Above chapter 35: "God himself will come," and so forth. "Behold the Lord." Here he shows the condition of the one coming; and first he shows that he will come strong to deliver, "in strength." "Arm" — strength on the day of judgment; or in the first coming of Christ, in the power of miracles, or in the destruction of Babylon. Job 40: "if you have an arm like God," and so forth; second, that he will come just to reward, "behold, a reward." "Work before him," because it is in the ease of the will. Wisdom 5: "but the just for ever," etc.; third he shows that he will come merciful, to console, "like a shepherd." To feed the hungry, "he will feed his flock." Ezekiel 34: "in the richest pastures," etc., Jeremiah 3: "I will give you shepherds," etc.; to gather together those who dissent, "in the arm," etc., John 10: "other sheep I have," etc.; to carry the failing, "in his bosom," etc., Luke 15: "when he has found it," and so forth. "Who has measured," and so forth. Here he shows the divine power; and first he establishes it against the errors of the idolaters, who derogated from the divine power by making the creature equal to the Creator. Romans 1: "they served the creature," etc.; second, against the despair of the Jews, who derogated from the divine power by distrust, "lift up on high," and so forth. Concerning the first, two things: first he shows the power of God; second he excludes the error, "to whom then like," and so forth. Concerning the first, three things. First he shows the divine power, together with wisdom, in the easy measuring and creation of all things: for he made all things "in number," as to the multitude of principles; "in measure," as to determination under proper being; "in weight," as to inclination toward an end. Wisdom 11: "with the fist" — that is, easily, as things that are measured with the fist, which is the closed hand; "with the palm" — that is, easily, which is the open hand: "he hung it upon nothing," Job 26, because it is supported by nothing external; otherwise the earth's rest would be violent. "Upon the waters," in Psalm 28, as to position, because it is surrounded by waters. Psalm 103: "upon its own stability," as to its own cause of rest, which is its own nature: "with three fingers" — easily; or by three properties, gravity, dryness, and immobility, "he weighed" — he made them balanced by their own weight. Second he shows the sufficiency of his power, because he needs no helper, "who helped" — against the philosophers who held that, through the mediation of the first things caused, the last things were created; of wisdom, because he needs no counsel, "or who," that he might give him counsel; "with whom," that he might ask of him; "instructed him" — the form of the work; "the path of justice" — of natural justice, which he prefixed to all things, so that no thing might exceed the bounds of its own nature; "knowledge" — concerning the cognition of created things, both universal and particular, against the philosophers; "the way of prudence" — as to the governance of the world. Job 26: "whose helper are you? is it not," and so forth. Third he shows his excellence: because he exceeds the whole multitude of the nations, "behold the nations." "As a drop" — a small drop — "of the bucket," falling from the bucket, which is a water vessel fit for the thirsty, which is reckoned as nothing; "the moment" which is between the arms of the scale, which easily inclines to either side. Job 26: "when scarce a small drop," etc.; he shows also that he exceeds every fitting honor, and especially as to offering. "And Lebanon" — that is, the wood of Lebanon, with which it abounds, because it is wooded, and the animals, with which it abounds, because it is full of pasture. Micah 6: "what worthy thing shall I offer to the Lord," etc.; he shows also that he exceeds every perfection of creatures: both the natural, because their being, with respect to God, is non-being — for Dionysius says, in the book On the Divine Names, chapter 12, that by as much as things participating exceed things not participating, and the participations exceed the things participating, by so much does he who is the principle of the participations exceed both the participations and the things participating. "All nations are as if they were not," etc.; and as to the perfections superadded, which in a certain way are filling — "and as nothing," etc., Jeremiah 4: "I beheld the earth," and so forth. "To whom then," and so forth. Here he excludes the error; and first he derides the error as to the intention of the one working, because they wanted to make God. Therefore, since he is so powerful, "to whom like?" He speaks according to the error of those who thought the very likenesses themselves were gods. "Or what image?" As to those who thought that the things of which they were likenesses — such as the sun or the moon, etc. — Exodus 15: "who is like you among the strong," etc.; and as to the foolish working, because they wanted to induce a most noble form into vile matter, "has the graven image," etc., Wisdom 14: "the incommunicable name," and so forth. Second he convicts the one in error; and first from the natural law dictating, "shall you not know?" — by natural reason, that idols are not gods; and from the written law forbidding, "has it not been declared?" Romans 10: "have they not heard," and so forth. He convicts also from the consideration of creatures: of earthly things, as to creation, "have you not understood the foundations of the earth?" — that they were founded by him; that is, that part of the earth which is near the center. Proverbs 8: "when he weighed out the foundations," etc.; and as to the creator, who "sits upon the circle" — because it is spherical — as one governing; and "the inhabitants" are "as locusts," with respect to the greatness of the earth, or of God himself. From the creation also of the heavenly creatures: "who stretches out" — as to the magnitude of the heaven — "as nothing" — as to the subtlety of its substance — "as a tent" — for himself, as that in which his power first shines forth among bodily things, as to power. Or as for the habitation of the angels and saints, as to dignity; or also of the whole lower creation, as to its brightness. Jeremiah 10: "he prepares the world in wisdom," and so forth. Third he convicts them as to the subjugation of the great, setting forth the destruction of those who are great. Whether according to knowledge, "who gives" — of secrets, namely the philosophers; or according to power, "the judges" — that is, the princes. Psalm 63: "they have failed that search," etc.; and he shows the ease of the destruction through the likeness of grass, or of a tree that does not have firm roots in the earth. "And indeed not even," etc., Job 13: "against a leaf that is carried away by the wind," and so forth. Third he sets down the conclusion, "and to whom have you likened," etc., Psalm 88: "who among the clouds shall be equaled," and so forth. "Lift up," and so forth. Here he establishes the same thing against those who despair; and first he establishes the divine majesty from the creation of things, "who created these," namely the heavenly things. Psalm 32: "he spoke, and they were made," etc.; from the perfection of knowledge, "who brings out," to fulfill his own will, "in number," determined in his own knowledge, "their host" — namely, of the heavens, the stars or the angels — "by name," determining for each its own proper nature, whence it might be named. Psalm 146: "who numbers the multitude," etc.; from the fullness of dominion, "because of the greatness of his might" — for attacking; "of strength" — for resisting; "of power" — for working: "was" — from his lordship. Job 25: "is there any number," and so forth. Second he excludes the error. And first he sets down the error, "why do you say." "Hidden" — he does not see the evils I suffer, otherwise he would defend me. "Judgment" — that is, the power of judging, which he formerly had. Ecclesiasticus 16: "say not, I shall be hidden from God," etc., Ezekiel 9: "they said, he has forsaken," and so forth. Second he sets down the refutation of the error; and first the confirmation of the proof from the law: "do you not know?" — by the natural law; "or have you not heard?" — by the written law — these things that follow. Second he sets down the refutation, first showing the greatness of God from those things which he has in himself, namely, the eternity of dominion, "the everlasting God," etc., Exodus 15: "the Lord has reigned forever," etc.; the unfailing power, "he shall not faint" — so as to be unable to do all things — "nor labor" — so as to be able only with difficulty, Daniel 7: "his power," etc.; the incomprehensibility of knowledge, "nor is there any searching out." Romans 11: "how incomprehensible are," and so forth. Second, through the great things which he does in others: and first in those whom he comforts — their former weakness — "who gives to the weary," as to him who was formerly strong and has failed; and "to those who are not," as to those who were never strong, above chapter 25: "made a strength to the poor," etc., Romans 4: "calls the things that are not," 1 Corinthians 1: "has chosen the things that are weak." Second he shows the greatness of this strength by comparison with natural strength, which he first shows to fail: "the children shall faint" — those who are in the state of growing; "the young men" — who seem robust. 1 Kings 2: "not in his own strength," and so forth. Second, the greatness of the strength given by God: "but they who hope shall change their strength" — namely, natural strength into divine — so that they are not wearied by ascent, "they shall take wings," Proverbs 23: "they shall make themselves wings," etc., nor even by swift running, "they shall run," nor even by continuous walking, "they shall walk," etc., above chapter 5: "there is none that is faint nor labors," etc. (Collationes, chapter 40). The spirit of the Lord is helped (not in creation but in justification — Augustine: "he who created you without you," etc.): through preaching, 1 Corinthians 3: "God's helpers," etc., through preparation, James 4: "draw near to the Lord," etc., through cooperation, Hebrews 12: "watching, lest anyone be lacking," and so forth. The saints are compared to eagles: because of the height of their flight, Job 39: "is it at your command," etc. — in which is the eminence of contemplation, above chapter 33: "the king in his beauty," etc.; because of the keenness of their scent, Luke 16: "wherever the body shall be," etc. — in which is the fervor of love, Song of Songs 1: "draw me after you," etc.; because of the loftiness of their dwelling place, Proverbs 30: "there are three things to me," etc. — in which is the zeal for heavenly conversation, Philippians 3: "our conversation," etc.; because of the swiftness of their movement, Lamentations 4: "they were swifter," etc. — in which is the readiness for good work, Proverbs 22: "you have seen a man," etc.; because of their renewal, Psalm: "it shall be renewed as the eagle's," etc. — in which is the zeal for amendment and progress, 2 Corinthians 4: "although he who is outward," etc.; because of the beauty of their limbs, Ezekiel 17: "a great eagle," etc. — in which is the beauty of the virtues, Song of Songs 4: "you are all fair," etc.; because of their solicitude for their young, Deuteronomy 32: "as an eagle provoking," etc. — in which is the solicitude of the saints, 2 Corinthians 11: "who is weak," and so forth.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“The voice said, cry,.... Not the same voice as in Isa 40:3, nor the voice of an angel, as Aben Ezra; but a voice from the Lord, as Jarchi; the voice of prophecy, says Kimchi; it is the Lord's voice to the prophet, or rather to any and every Gospel minister, giving them an order to prophesy and preach, without which they cannot preach regularly and lawfully; it is the same as, "go, teach all nations", &c. preach the Gospel to every creature, &c. Mat 28:19, and he said, what shall I cry? publish, proclaim, or preach? for a minister of the Gospel is to preach not out of his own heart, or of his own head, or what is of his own devising and framing, but what is agreeable to the mind of Christ, as revealed in his word; he is to speak according to the oracles of God, the proportion and analogy of faith; he is to inquire there, and of Christ, what he shall say. The Targum is, "the voice of him that saith, prophesy; and he answered and said, what shall I prophesy?'' The reply is, all flesh is grass; declare the frailty and mortality of men; which some think is mentioned, to increase the wonder of Christ's incarnation, after prophesied of, as the forerunner of it is before; that Christ should condescend to take upon him such frail mortal flesh; that he should become flesh, and be manifested in it: or rather this is to be said, to put men in mind and to prepare them to think of another world, and how they shall appear before the judgment seat; seeing, if they have not a better righteousness than their own, and except they are born again, they shall neither see nor enter into the kingdom of heaven; which is one of the first things to be published in the Gospel ministry; as also how weak, impotent, and insufficient, men are, to that which is good, which may be meant by this phrase; being as weak as a spire of grass, not able to do any good actions, much less to fulfil the law, or to regenerate themselves, renew their hearts, or cleanse their natures: and this must be said, to abate the pride of men; to show the necessity of divine power in regeneration; to instruct men to seek for the grace of God, as to convert them, so to help and assist them in all they do; and to direct them to ascribe all they have, and are, to the grace of God; to this purpose the Apostle Peter quotes this passage, Pe1 1:23. It may be applied to the ordinances of the legal dispensation, and all the privileges of it, which are said to be carnal; and trusting in them was trusting in the flesh, Phi 3:4, Heb 9:10, these were weak and insufficient to justify, sanctify, and save, and were not to continue: and all the goodliness thereof is as the flower of the field; all the goodliness and glory of man; all that is excellent and valuable in him, or belonging to him, Or that is thought to be so, his riches, honours, strength, beauty, wisdom, and knowledge; yea, all his seeming holiness and righteousness; which are all fading and perishing, like a gay flower, which appears lovely for a while, and on a sudden falls off, or is cropped, or trampled upon; to which a flower of the field is more liable than that of the garden. This may be applied to the splendour of the legal dispensation, which is done away by a more excellent glory taking place, Co2 3:10.”
Source
1849
A.D.
1774–1849
“Field. On the downfall of the empire of Babylon, the Jews were liberated.”
1863
A.D.
1796–1863
“P. " The goodliness thereof." 11071- Lit. " Mercy," " kindness." liowth, after Honbigant, thinks the true reading to be llin •”
1871
A.D.
1871
“The voice--the same divine herald as in Isa 40:3. he--one of those ministers or prophets (see on Isa 40:1) whose duty it was, by direction of "the voice," to "comfort the Lord's afflicted people with the promises of brighter days." All flesh is grass--The connection is, "All human things, however goodly, are transitory: God's promises alone steadfast" (Isa 40:8, Isa 40:15, Isa 40:17, Isa 40:23-24); this contrast was already suggested in Isa 40:5, "All flesh . . . the mouth of the Lord." Pe1 1:24-25 applies this passage distinctly to the gospel word of Messiah (compare Joh 12:24; Jam 1:10).”
Source
1875
A.D.
Keil & Delitzsch Lutheran
1861–1875
“The prophet now hears a second voice, and then a third, entering into conversation with it. "Hark, one speaking, Cry! And he answers, What shall I cry? All flesh is grass, and all its beauty as the flower of the field. Grass is withered, flower faded: for the breath of Jehovah has blown upon it. Surely grass is the people; grass withereth, flower fadeth: yet the word of our God will stand for ever." A second voice celebrates the divine word of promise in the face of the approaching fulfilment, and appoints a preacher of its eternal duration. The verb is not ואמר (et dixi, lxx, Vulg.), but ואמר; so that the person asking the question is not the prophet himself, but an ideal person, whom he has before him in visionary objectiveness. The appointed theme of his proclamation is the perishable nature of all flesh (Isa 40:5 πᾶσα σάρξ, here πᾶσα ἡ σάρξ), and, on the other hand, the imperishable nature of the word of God. Men living in the flesh are universally impotent, perishing, limited; God, on the contrary (Isa 31:3), is the omnipotent, eternal, all-determining; and like Himself, so is His word, which, regarded as the vehicle and utterance of His willing and thinking, is not something separate from Himself, and therefore is the same as He. Chasdō is the charm or gracefulness of the outward appearance (lxx; Pe1 1:24, δόξα: see Schott on the passage, Jam 1:11, εὐπρέπεια). The comparison instituted with grass and flower recals Isa 37:27 and Job 8:12, and still more Psa 90:5-6, and Job 14:2. Isa 40:7 describes what happens to the grass and flower. The preterites, like the Greek aoristus gnomicus (cf., Isa 26:10), express a fact of experience sustained by innumerable examples: exaruit gramen, emarcuit flos; (Note: נבל has munach here and in Isa 40:8 attached to the penultimate in all correct texts (hence milel, on account of the monosyllable which follows), and mehteg on the tzere to sustain the lengthening.) consequently the כּי which follows is not hypothetical (granting that), but explanatory of the reason, viz., "because rūăch Jehovah hath blown upon it," i.e., the "breath" of God the Creator, which pervades the creation, generating life, sustaining life, and destroying life, and whose most characteristic elementary manifestation is the wind. Every breath of wind is a drawing of the breath of the whole life of nature, the active indwelling principle of whose existence is the rūăch of God. A fresh v. ought to commence now with אכן. The clause העם חציר אכן is genuine, and thoroughly in Isaiah's style, notwithstanding the lxx, which Gesenius and Hitzig follow. עכן is not equivalent to a comparative כן (Ewald, 105, a), but is assuring, as in Isa 45:15; Isa 49:4; Isa 53:4; and hâ‛âm (the people) refers to men generally, as in Isa 42:5. The order of thought is in the form of a triolet. The explanation of the striking simile commences with 'âkhēn (surely); and then in the repetition of the words, "grass withereth, flower fadeth," the men are intended, resemble the grass and the flower. Surely grass is the human race; such grass withereth and such flower fadeth, but the word of our God (Jehovah, the God of His people and of sacred history) yâqūm le‛ōlâm, i.e., it rises up without withering or fading, and endures for ever, fulfilling and verifying itself through all times. This general truth refers, in the preset instance, to the word of promise uttered by the voice in the desert. If the word of God generally has an eternal duration, more especially is this the case with the word of the parousia of God the Redeemer, the word in which all the words of God are yea and amen. The imperishable nature of this word, however, has for its dark foil the perishable nature of all flesh, and all the beauty thereof. The oppressors of Israel are mortal, and their chesed with which they impose and bribe is perishable; but the word of God, with which Israel can console itself, preserves the fields, and ensures it a glorious end to its history. Thus the seal, which the first crier set upon the promise of Jehovah's speedy coming, is inviolable; and the comfort which the prophets of God are to bring to His people, who have now been suffering so long, is infallibly sure.”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.