The psalm rises to high poetic fervour and imaginative beauty in the terrible petitions of vv. 13-16. The word rendered "whirling dust" in ver. 13 is somewhat doubtful. It literally means _a rolling thing_, but what particular thing of the sort is difficult to determine. The reference is perhaps to "spherical masses of dry weeds which course over the plains." Thomson ("Land and Book," 1870, p. 563) suggests the wild artichoke, which, when ripe, forms a globe of about a foot in diameter. "In autumn the branches become dry and as light as a feather, the parent stem breaks off at the ground, and the wind carries these vegetable globes whithersoever it pleaseth. At the proper season thousands of them come scudding over the plain, rolling, leaping, bounding." So understood, the clause would form a complete parallel with the next, which compares the fleeing foe to stubble, not, of course, rooted, but loose and whirled before the wind. The metaphor of ver. 14 is highly poetic, likening the flight of the foe to the swift rush of a forest fire, which licks up (for so the word rendered _scorches_ means) the woods on the hillsides, and leaves a bare, blackened space. Still more terrible is the petition in ver. 15, which asks that God Himself should chase the flying remnants, and beat them down, helpless and panic-stricken, with storm and hurricane, as He did the other confederacy of Canaanitish kings, when they fled down the pass of Beth-Horon, and "Jehovah cast down great stones on them from heaven" (Josh. x. 10, 11).
But there is a deeper desire in the psalmist's heart than the enemies' destruction. He wishes that they should be turned into God's friends, and he wishes for their chastisement as the means to that end. "That they may seek Thy face, Jehovah," is the sum of his aspirations, as it is the inmost meaning of God's punitive acts. The end of the judgment of the world, which is continually going on by means of the history of the world, is none other than what this psalmist contemplated as the end of the defeat of that confederacy of God's enemies--that rebels should seek His face, not in enforced submission, but with true desire to sun themselves in its light, and with heart-felt acknowledgment of His Name as supreme through all the earth. The thought of God as standing alone in His majestic omnipotence, while a world is vainly arrayed against Him, which we have traced in vv. 5-7, is prominent in the close of the psalm. The language of ver. 18 is somewhat broken, but its purport is plain, and its thought is all the more impressive for the irregularity of construction. God alone is the Most High. He is revealed to men by His Name. It stands alone, as He in His nature does. The highest good of men is to know that that sovereign Name is unique and high above all creatures, hostile or obedient. Such knowledge is God's aim in punishment and blessing. Its universal extension must be the deepest wish of all who have for themselves learned how strong a fortress against a world in arms that Name is; and their desires for the foes of God and themselves are not in harmony with God's heart, nor with this psalmist's song, unless they are, that His enemies may be led, by salutary defeat of their enterprises and experience of the weight of God's hand, to bow, in loving obedience, low before the Name which, whether they recognise the fact or not, is high above an the earth.