For all flesh He aptly quotes the passage from Isaiah to prove both clauses; that is, to make it evident how fading and miserable is the first birth of man, and how great is the grace of the new birth. For as the Prophet there speaks of the restoration of the Church, to prepare the way for it, he reduces men to nothing lest they should flatter themselves. I know that the words are wrongly turned by some to another sense; for some explain them of the Assyrians, as though the Prophet said, that there was no reason for the Jews to fear so much from flesh, which is like a fading flower. Others think that the vain confidence which the Jews reposed in human aids, is reproved. But the Prophet himself disproves both these views, by adding, that the people were as grass; for he expressly condemns the Jews for vanity, to whom he promised restoration in the name of the Lord. This, then, is what I have already said, that until their own emptiness has been shewn to men, they are not prepared to receive the grace of God. In short, such is the meaning of the Prophet: as exile was to the Jews like death, he promised them a new consolation, even that God would send prophets with a command of this kind. The Lord, he says, will yet say, "Comfort ye my people;" and that in the desert and the waste, the prophetic voice would yet be heard, in order that a way might be prepared for the Lord. (Isaiah 40:6.) And as the obstinate pride which filled them, must have been necessarily purged from their minds, in order that an access might be open for God, the Prophet added what Peter relates here respecting the vanishing glory of the flesh. What is man? he says -- grass; what is the glory of man? the flower of the grass. For as it was difficult to believe that man, in whom so much excellency appears, is like grass, the Prophet made a kind of concession, as though he had said, "Be it, indeed, that flesh has some glory; but lest that should dazzle your eyes, know that the flower soon withers." He afterwards shews how suddenly everything that seems beautiful in men vanishes, even through the blowing of the Spirit of God; and by this he intimates, that man seems to be something until he comes to God, but that his whole brightness is as nothing in his presence; that, in a word, his glory is in this world, and has no place in the heavenly kingdom. The grass withereth, or, has withered. Many think that this refers only to the outward man; but they are mistaken; for we must consider the comparison between God's word and man. For if he meant only the body and what belongs to the present life, he ought to have said, in the second place, that the soul was far more excellent. But what he sets in opposition to the grass and its flower, is the word of God. It then follows, that in man nothing but vanity is found. Therefore, when Isaiah spoke of flesh and its glory, he meant the whole man, such as he is in himself; for what he ascribed as peculiar to God's word, he denied to man. In short, the Prophet speaks of the same thing as Christ does in John 3:3, that man is wholly alienated from the kingdom of God, that he is nothing but an earthly, fading, and empty creature, until he is born again.

For all flesh is as grass - That is, all human beings, all men. The connection here is this: The apostle, in the previous verse, had been contrasting that which is begotten by man with that which is begotten by God, in reference to its permanency. The forher was corruptible and decaying; the latter abiding. The latter was produced by God, who lives forever; the former by the agency of man, who is himself corruptible and dying. It was not unnatural, then, to dwell upon the feeble, frail, decaying nature of man, in contrast with God; and the apostle, therefore, says that "all flesh, every human being, is like grass. There is no stability in anything that man does or produces. He himself resembles grass that soon fades and withers; but God and his word endure forever the same." The comparison of a human being with grass, or with flowers, is very beautiful, and is quite common in the Scriptures. The comparison turns on the fact, that the grass or the flower, however green or beautiful it may be, soon loses its freshness; is withered; is cut down, and dies. Thus, in Psalm 103:15-16;
"As for man, his days are as grass;
As a flower of the field, so he flourisheth;
For the wind passeth over it and it is gone,
And the place thereof shall know it no more."
So in Isaiah 40:6-8; a passage which is evidently referred to by Peter in this place:
"The voice said, Cry.
And he said, What shall I cry?
All flesh is grass,
And all the goodliness thereof is as the flower of the field.
The grass withereth,
The flower fadeth,
When the wind of Jehovah bloweth upon it:
Surely the people is grass,
The grass withereth,
The flower fadeth,
But the word of our God shall stand forever."
See also James 1:10-11. This sentiment is beautifully imitated by the great dramatist in the speech of Wolsey:
"This is the state of man; today he puts forth.
The tender leaves of hope, tomorrow blossoms,
And bears his blushing honors thick upon him.
The third day comes a frost, a killing frost,
And - when he thinks, good easy man, full surely.
His greatness is a ripening - nips his root,
And then he falls."
Compare the notes at Isaiah 40:6-8.
And all the glory of man - All that man prides himself on - his wealth, rank, talents, beauty, learning, splendor of equipage or apparel.
As the flower of grass - The word rendered "grass," (χόρτος chortos,) properly denotes herbage; that which furnishes food for animals - pasture, hay. Probably the prophet Isaiah, from whom this passage is taken, referred rather to the appearance of a meadow or a field, with mingled grass and flowers, constituting a beautiful landscape, than to mere grass. In such a field, the grass soon withers with heat, and with the approach of winter; and the flowers soon fade and fall.
The grass withereth, and the flower thereof falleth away - This is repeated, as is common in the Hebrew writings, for the sake of emphasis, or strong confirmation.

For all flesh is as grass - Earthly seeds, earthly productions, and earthly generations, shall fail and perish like as the grass and flowers of the field; for the grass withereth, and the flower falleth off, though, in the ensuing spring and summer, they may put forth new verdure and bloom.

(14) For all (l) flesh [is] as grass, and all the glory of man as the flower of grass. The grass withereth, and the flower thereof falleth away:
(14) A reason why we need this heavenly birth, that is, because men, though their glory may not be great, are by nature void of all true and sound goodness.
(l) The word, "flesh", shows the weakness of our nature, which is chiefly to be considered in the flesh itself.

All men, as born of corruptible seed, are frail, mortal, and perishing; they spring up like grass, and look beautiful for a while, but are very weak and tender, and in a little time they are cut down by death, and wither away; and while they live, are, in a good measure, nothing but grass in another form; the substance of their life is greatly by it; what is the flesh they eat, but grass turned into it? and this mortality is not only the case of wicked men, as the Jews (l) interpret the word, but of good men; even of the prophets, and preachers of the Gospel; and yet the word of God spoken by them continues for ever: the passage referred to is in Isaiah 40:6.
and all the glory of man as the flower of the grass; all outward things which are in esteem with men, and render them glorious to one another, as riches, honour, wisdom, strength, external righteousness, holiness, and goodness; all which are fading and transitory, like the flower of the field; but the Gospel continues, and reveals durable riches, and honour with Christ; and true wisdom and strength with him, and spiritual knowledge, in comparison of which, all things are dross and dung; and an everlasting righteousness; and true holiness in him: some have thought respect may be had to the legal dispensation, and to all the glory and stateliness and goodliness of the worship and ordinances of it, which were to endure but for a time, and are now removed; and the Gospel dispensation has taken place of them, which will continue to the end of the world:
the grass withereth, and the flower thereof fadeth away; and so fading are all the above things,
(l) Targum, Jarchi, & Kimchi, in Isaiah. xl. 6.

Scripture proof that the word of God lives for ever, in contrast to man's natural frailty. If ye were born again of flesh, corruptible seed, ye must also perish again as the grass; but now that from which you have derived life remains eternally, and so also will render you eternal.
flesh--man in his mere earthly nature.
as--omitted in some of the oldest manuscripts.
of man--The oldest manuscripts read, "of it" (that is, of the flesh). "The glory" is the wisdom, strength, riches, learning, honor, beauty, art, virtue, and righteousness of the NATURAL man (expressed by "flesh"), which all are transitory (John 3:6), not OF MAN (as English Version reads) absolutely, for the glory of man, in his true ideal realized in the believer, is eternal.
withereth--Greek, aorist: literally, "withered," that is, is withered as a thing of the past. So also the Greek for "falleth" is "fell away," that is, is fallen away: it no sooner is than it is gone.
thereof--omitted in the best manuscripts and versions. "The grass" is the flesh: "the flower" its glory.

All flesh - Every human creature is transient and withering as grass. And all the glory of it - His wisdom, strength, wealth, righteousness. As the flower - The most short - lived part of it. The grass - That is, man. The flower - That is, his glory. Is fallen off - As it were, while we are speaking. Isaiah 40:6, &c.