Does the psalm proceed to recount what its author said when he broke silence? It may appear so at first sight. On the other hand, the calm prayer which follows, beginning with ver. 4, is not of the character of the wild and whirling words which were suppressed for fear of sinning, nor does the fierce fire of which the psalm has been speaking flame in it. It seems, therefore, more probable that those first utterances, in which the overcharged heart relieved itself, and which were tinged with complaint and impatience, are not preserved, and did not deserve to be, and that the pathetic, meditative petitions of the rest of the psalm succeeded them, as after the first rush of the restrained torrent comes a stiller flow. Such a prayer might well have been offered "while the wicked is before me," and might have been laid to heart by them. Its thoughts are as a cool hand laid on the singer's hot heart. They damp the fire burning in him. There is no surer remedy for inordinate sensibility to outward sorrows than fixed convictions of life's brevity and illusoriness; and these are the two thoughts which the prayer casts into sweet, sad music.
It deals with commonplaces of thought, which poets and moralists have been singing and preaching since the world began, in different tones and with discordant applications, sometimes with fierce revolt against the inevitable, sometimes with paralysing consciousness of it, sometimes using these truths as arguments for base pleasures and aims, sometimes toying with them as occasions for cheap sentiment and artificial pathos, sometimes urging them as motives for strenuous toil. But of all the voices which have ever sung or prophesied of life's short span and shadowy activities, none is nobler, saner, healthier, and calmer than this psalmist's. The stately words in which he proclaimed the transiency of all earthly things are not transient. They are "nothing but a breath," but they have outlasted much that seemed solid, and their music will sound as long as man is on his march through time. Our "days" have a "measure"; they are a limited period, and the Measurer is God. But this fleeting creature man has an obstinate fancy of his permanence, which is not all bad indeed--since without it there would be little continuity of purpose or concentration of effort--but may easily run to extremes and hide the fact that there is an end. Therefore the prayer for Divine illumination is needed, that we may not be ignorant of that which we know well enough, if we would bethink ourselves. The solemn convictions of ver. 5 are won by the petitions of ver. 4. He who asks God to make him know his end has already gone far towards knowing it. If he seeks to estimate the "measure" of his days, he will soon come to the clear conviction that it is only the narrow space that may be covered by one or two breadths of a hand. So do noisy years shrink when heaven's chronology is applied to them. A lifetime looks long, but set against God's eternal years, it shrivels to an all but imperceptible point, having position, but not magnitude.
The thought of brevity naturally draws after it that of illusoriness. Just because life is so frail does it assume the appearance of being futile. Both ideas are blended in the metaphors of "a breath" and "a shadow." There is a solemn earnestness in the threefold "surely," confirming each clause of the seer's insight into earth's hollowness. How emphatically he puts it in the almost pleonastic language, "Surely nothing but a breath is every man, stand he ever so firm." The truth proclaimed is undeniably certain. It covers the whole ground of earthly life, and it includes the most prosperous and firmly established. "A breath" is the very emblem of transiency and of unsubstantiality. Every solid body can be melted and made gaseous vapour, if heat enough is applied. They who habitually bring human life "before Thee" dissolve into vapour the solid-seeming illusions which cheat others, and save their own lives from being but a breath by clearly recognising that they are.