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A very favourite contrast with psalmists and poets.

I. A CONTRAST BASED ON A FACT. The fact is that man's life is changeable and brief. This is true of a man's bodily life, intellectual life, and life of relations. It is impressed on a man in his times of sickness, especially when sickness comes breaking into and breaking up his plans, as in the case of king Hezekiah. Here the psalmist puts the fact into two figures - the passing shadow, the quickly withered grass. Precisely the metaphor is taken from the lengthening, that is, the evening shadow, which Rashi thus explains: "When it is the time of evening the shadows lengthen, but when it is dark they are no longer discernible, but come to an end and go." The figure of the short-lived grass is one of the most familiar in the Bible. It is more striking in the hot Eastern countries, where blasting winds come, than with us. The contrast is the Divine continuity and persistency. The cedars outlive the storms of many winters, but die at last. They endure through some generations, but fall at last. God survives all kinds of winters, and lasts through all generations. The successions of the afflicted have always the Divine Healthy One to whom they can look. They may comfort themselves with the assurance that what he was, he is, and ever will be.

II. A CONTRAST BASED ON AN IMAGINATION. Nobody really knows anything about the earth perishing, and the heavens being folded up, though scientific men venture now to calculate the actual number of years that the earth may be expected to last. Ver. 25 is poetry, and based on Eastern knowledge and ideas of the form of earth and heaven. We can imagine all material things changing and passing. We know that nothing created retains its form long. And yet certain things of creation seem permanent and immovable. We speak of the "everlasting mountains," the "solid earth," the "infinite heavens." But think of the mountains shaken down, the earth shifted from its place, and the heavens folded up, and then God is the same, unaffected; nay, he is the supreme force that crumbles the mountains, refashions the earth, and rolls up the heavens that he "spread abroad." God stands in absolute contrast with

(1) all our experiences, and

(2) with all our imaginations.

The flux and reflux characteristic of material things never affect him "whose years are throughout all generations." - R.T.

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KJV: But thou, O LORD, shalt endure for ever; and thy remembrance unto all generations.

WEB: But you, Yahweh, will remain forever; your renown endures to all generations.