For thou shalt forget misery; as waters that are passed away shalt thou remember it;

For thou dost forget misery, As waters passed away thou rememberest.

For your sorrow will go from your memory, like waters flowing away:

Misery, likewise, you would forget, or would remember only like waters that have passed by.

And remember it as waters that pass away - As calamity that has completely gone by, or that has rolled on and will return no more. The comparison is beautiful. The water of the river is borne by us, and returns no more. The rough, the swollen, the turbid stream, we remember as it foamed and dashed along, threatening to sweep everything away; but it went swiftly by, and will never come back. So with afflictions. They are soon gone. The most intense pain soon subsides. The days of sorrow pass quickly away. There is an outer limit of suffering, and even ingenuity cannot prolong it far. The man disgraced, and whose life is a burden, will soon die. On the checks of the solitary prisoner doomed to the dungeon for life, a "mortal paleness" will soon settle down, and the comforts of approaching death will soothe the anguish of his sad heart. The rack of torture cheats itself of its own purpose, and the exhausted sufferer is released. "The excess (of grief) makes it soon mortal." "No sorrow but killed itself much sooner." Shakespeare. When we look back upon our sorrows, it is like thinking of the stream that was so much swollen, and was so impetuous. Its waters rolled on, and they come not back again; and there is a kind of pleasure in thinking of that time of danger, of that flood that was then so fearful, and that has now swept on to come back no more. So there is a kind of peaceful joy in thinking of the days of sorrow that are now fled forever; in the assurance that those sad times will never, never recur again.

Because thou shalt forget thy misery - Thou shalt have such long and complete rest, that thou shalt scarcely remember thy labor.
As waters that pass away - Like as the mountain floods, which sweep every thing before them, houses, tents, cattle, and the produce of the field, and are speedily absorbed by the sandy plains over which they run, so shalt thou remember thy sufferings: they were wasting and ruinous for the time, but were soon over and gone.

Because thou shall forget thy misery,.... Former afflictions and distresses; having an abundance of prosperity and happiness, and long continued; and so, in process of time, the miseries and distresses before endured are forgotten; thus it was with Joseph in his advanced state, and therefore he called one of his sons Manasseh, Genesis 41:51; and as it is with convinced and converted persons and believers in Christ, who, under first convictions and awakenings, are filled with sorrow and distress, on a view of their miserable estate by nature; but when Christ is revealed to them as their Saviour and Redeemer, and the love of God is shed abroad in their hearts, and they have faith and hope in Jesus, and a comfortable view of heaven and happiness, and eternal life, by him, they forget their spiritual poverty, and remember their misery no more, unless it be to magnify the riches of the grace of God; see Proverbs 31:6;
and remember it as waters that pass away; either the waters of the stream in a river, which, when gone, are seen and remembered no more or as waters occasioned by floods in the winter season, which when over, and summer is come, are gone and are no more discerned; and as they pass from the places where they were, so from the minds of men: or it may be respect is had to the waters of Noah's flood, which, according to the divine promise and oath, should no more go over the earth, Genesis 9:15; and being past and gone, and no fear or danger of their returning, are forgotten.

Just as when the stream runs dry (Job 6:17), the danger threatened by its wild waves is forgotten (Isaiah 65:16) [UMBREIT].

16 For thou shalt forget thy grief,
Shalt remember it as waters that flow by.
17 And thy path of life shall be brighter than mid-day;
If it be dark, it shall become as morning.
18 And thou shalt take courage, for now there is hope;
And thou shalt search, thou shalt lie down in safety.
19 And thou liest down without any one making thee afraid;
And many shall caress thy cheeks.
20 But the eyes of the wicked languish,
And refuge vanisheth from them,
And their hope is the breathing forth of the soul.
The grief that has been surmounted will then leave no trace in the memory, like water that flows by (not: water that flows away, as Olshausen explains it, which would be differently expressed; comp. Job 20:28 with 2-Samuel 14:14). It is not necessary to change אתּה כּי into עתּה כּי (Hirzel); אתה, as in Job 11:13, strengthens the force of the application of this conclusion of his speech. Life (חלד, from חלד to glide away, slip, i.e., pass away unnoticed,
(Note: Vid., Hupfeld on Psalm 17:14, and on the other hand Bttcher, infer. 275 s., who, taking חלד in the sense of rooting into, translates: "the mildew springs up more brilliant than mid-day." But whatever judgment one may form of the primary idea of חלד, this meaning of חלד is too imaginary.)
as αἰών, both life-time, Psalm 39:6, and the world, Psalm 49:2, here in the former sense), at the end of which thou thoughtest thou wert already, and which seemed to thee to run on into dismal darkness, shall be restored to thee (יקום with Munach on the ult. as Job 31:14, not on the penult.) brighter than noon-day (מן, more than, i.e., here: brighter than, as e.g., Micah 7:4, more thorny than); and be it ever so dark, it shall become like morning. Such must be the interpretation of תּעפה. It cannot be a substantive, for it has the accent on the penult.; as a substantive it must have been pointed תּעוּפה (after the form תּקוּדה, תּקוּמה, and the like). It is one of the few examples of the paragogic strengthened voluntative in the third pers., like Psalm 20:4; Isaiah 5:19
(Note: In other instances, as תּרנּה, Proverbs 1:20; Proverbs 8:3, and ותּעגּבה, Ezekiel 23:20, the ah is not the cohortative form, but either paragogic without special meaning or (so that the fut. has a double feminine form) as feminine termination, as is evident in Job 22:21, where the ah is combined with the inflection.)
(Ges. 48, 3); the cohortative form of the future is used with or without אם (vid., on Psalm 73:16) in hypothetical antecedent clauses (Ges. 128, 1). Translate therefore: should it become dark (accordingly correctly accented with Rebia mugrasch), from עוּף, to envelope one's self, to darken (whence עפתה, Job 10:22), not: shouldst thou become dark (Schlottm.). The feminine forms are instead of the neuter, like תּמטיר, it rains, Amos 4:7; חשׁכה, it becomes dark, Micah 3:6 (Ges. 137, 2).
The fut. is followed by perff. consecutiva in Job 11:18 : And thou shalt take confidence, for there is ground for hope for thee; ישׁ, with the force of real and lasting existence. וחפרתּ is also perf. consec., and is rightly accented as such. If it were to be interpreted et si erubueris pudore tranquille cubabis, it would require the accent on the penult., since it would be a perf. hypotheticum. But although the seeming antithesis of וחפרת and לבטח (comp. Job 6:20) appears to favour this interpretation, it is nevertheless inadmissible, since it introduces a sadness into the promise: granted that thou shouldest be put to shame at this or that prospect; whereas, if חפר be taken in the sense of scrutari, as it is used by our poet (Job 3:21; Job 39:29) (not with Bttch., who comp. Ecclesiastes 5:11, in the signification fodere = to labour in the field, in which meaning it is not common), the tone of sadness is removed, and the accentuation is duly observed: and thou shalt search about (i.e., examine the state of thy household, which is expressed by וּפקדתּ in Job 5:24), thou shalt lay thyself down in peace (i.e., because thou findest everything in a prosperous condition, and hast no anxiety). This felling of security against every harm that may befall one's person or property, gained from trust in God, is expressed (Job 11:19) under the figure of the peaceful situation of a herd when removed from danger, - a figure which is borrowed from Leviticus 26:6, and is frequently repeated in the prophets (Isaiah 17:2; Zephaniah 3:13). The promises of Zophar culminate in a future exaltation which shall command reverence and inspire trust: et mulcebunt faciem tuam multi. פּני חלּה, to approach any one in humble entreaty, generally used in reference to God; less frequently, as here and Psalm 45:13; Proverbs 19:6, in reference to men in high positions. The end of the wicked, on the other hand, is told in Job 11:20. Zophar here makes use of the choicest expressions of the style of the prophetic psalms: כּלה, otherwise frequently used of those who pine away with longing, here and Job 17:5 of eyes that languish with unsatisfied longing; מנּהם (Aram. מנּהוןּ), poetic for מהם; נפשׁ מפּח, after the phrase נפשׁ נפח, he breathes forth his soul (Jeremiah 15:9, comp. Job 31:39). The meaning is not that death is their only hope, but that every expectation remains unfulfilled; giving up the ghost is that whither all their disappointed hopes tend.
That Zophar, in the mind of the poet, is the youngest of the three speakers, may be concluded from his introducing him last of all, although he is the most impetuous. Zophar manifests a still greater inability than the other two to bring Job to a right state of mind. His standpoint is the same as that of the others; like them, he regards the retributive justice of God as the principle on which alone the divine government in the world is exercised, and to which every act of this government is to be attributed, and it may indeed be assumed to be at work even when the relation of circumstances is mysterious and impenetrably dark to us. This limited view which the friends take of the matter readily accounts for the brevity of their speeches in comparison with Job's. This one locus communis is their only theme, which they reiterate constantly in some new and modified form; while the mind of Job is an exhaustless fountain of thought, suggested by the direct experiences of the past. Before the present dispensation of suffering came upon Job, he enjoyed the peace of true godliness, and all his thoughts and feelings were under the control of a consciousness, made certain by his experience, that God makes himself known to those who fear Him. Now, however, his nature, hitherto kept in subjection by divine grace, is let loose in him; the powers of doubt, mistrust, impatience, and despondency have risen up; his inner life is fallen into the anarchy of conflict; his mind, hitherto peaceful and well-disciplined, is become a wild chaotic confusion; and hence his speeches, in comparison with those of the friends, are as roaring cataracts to small confined streams. But in this chaos lie the elements of a new creation; the harsh pertinacity with which the friends maintain their one dogma only tends to give an impulse to it. The new truth, the solution of the mystery, springs from this spiritual battle Job has to fight, from which, although not scathless, he still shall come forth as conqueror.
Is the dogma of the friends, then, so pure a doctrine (זך לקח) as that which, according to Zophar's words, Job claims for himself? On Zophar's side it is maintained that God always acts in accordance with justice, and Job maintains that God does not always so act. The maxim of the friends is false in the exclusiveness with which they maintain it; the conclusion to which they are urged gives evidence of the fallacy of the premises: they must condemn Job, and consequently become unjust, in order to rescue the justice of God. Job's maxim, on the other hand, is true; but it is so unconnected as it stands, that it may be turned over any moment and changed into a falsehood. For that God does not act everywhere as the Just One is a truth, but that He sometimes acts unjustly is blasphemy. Between these two Job hangs in suspense. For the stedfast consciousness of his innocence proves to him that God does not always act as the Just One; shall he therefore suppose that God deals unjustly with him? From this blasphemous inversion of his maxim, Job seeks refuge in the absolute power of God, which makes that just which is unjust according to the clearest human consciousness. This is the feeble thread on which Job's piety hangs. Should this be cut, it would be all over with him. The friends do their best to cut it in twain. Zophar's speech is like a sword-thrust at it.
For while Eliphaz and Bildad with cautious gentleness describe suffering more as chastisement than as punishment, Zophar proceeds more boldly, and demands of Job that he should humble himself, as one who has incurred punishment from God. Of sin on Job's part which may have called down the divine judgment, Zophar knows as little as Job himself. But he wishes that God would grant Job some revelation of His infinite wisdom, since he refuses to humble himself. Then he would confess his folly, and see that God not only does not punish him unjustly, but even allows much of his guilt to go unpunished. Job is therefore to turn penitently to God, and to put away that evil which is the cause of his suffering, in order that he may be heard. Then shall his hopeless condition become bright with hope; whereas, on the other hand, the downfall of the wicked is beyond recovery. Ewald aptly remarks that thus even the concluding words of the speeches of the friends are always somewhat equivocal. "Eliphaz just adds a slight caution, Bildad introduces the contrast in a few words, and Zophar adds but a word; all these seem to be as the forerunners of a multitude of similar harsh threatenings, ch. 15, 18, 20."
What impression will this harsh treatment of Zophar's produce on Job? Job is to humble himself as a sinner who is undergoing the punishment of his sin, though the measure of it is far below the degree of his guilt; and while he does not deny his sinful weaknesses, he is nevertheless convinced that he is righteous, and having as such experienced the favour of God, cannot become an object of punishment. Brentius discriminatingly observes here: Videntur et Sophar et reliqui amici Hiob prorsus ignorare quid sit aut efficiat Evangelion et fides in promissionem Dei; sic argumentantur contra Hiobem, quasi nullus unquam possit coram Deo fide justificari. The language is rather too much in accordance with the light of the New Testament; but it is true that the friends know nothing whatever of the condition of a truly righteous man, over whom the law with its curse, or the retributive justice of God, has no power. The interpretation of affliction in accordance with the recognition of this principle is strange to them; and this is just the issue which is developed by the drama in the case of Job - the idea which comes to light in the working out of the plot. Even Job does not perceive the solution of the mystery, but, in the midst of the conflict, is in a state of ignorance which excites compassion; the ignorance of the friends arising from their shallowness of understanding, on the contrary, creates aversion. When Zophar, therefore, wishes that God would grant Job some revelation of His infinite wisdom, it is indeed true that Job is greatly in need of it; but it is self-deceiving pride which leads Zophar to imagine that he has no need of it himself. For this Wisdom which has decreed the suffering of Job is hidden from his also; and yet he does not treat the suffering of his friend as a divine mystery. He explains it as the working of the retributive justice of God; but since he endeavours thus to explain the mystery, he injures his cause, and if possible injures also the slender thread by which Job's faith hangs. For should Job regard his sufferings as a just divine retribution, he could then no longer believe on God as the Just One.

As waters - Thou shalt remember it no more, than men remember a land - flood, which as it comes, so it goes away suddenly.