Characteristic of these early psalms is the occurrence of a refrain (compare lvi. and lix.) which in the present instance closes both of the portions of which the hymn consists. The former of these (1-5) breathes prayerful trust, from which it passes to describe the encompassing dangers; the second reverses this order, and beginning with the dangers and distress, rises to ringing gladness and triumph, as though the victory were already won. The psalmist's confident cleaving of soul to God is expressed (ver. 1) by an image that may be connected with his circumstances at Engedi: "In Thee has my soul taken refuge." The English version is correct as regards the sense, though it obliterates the beautiful metaphor by its rendering "trusteth." The literal meaning of the verb is "to flee to a refuge," and its employment here may be due to the poetical play of the imagination, which likens his secure retreat among the everlasting hills to the safe hiding-place which his spirit found in God his habitation. A similar analogy appears in the earliest use of the expression, which may have been floating in the psalmist's memory, and which occurs in the ancient song of Moses (Deut. xxxii.). The scenery of the forty years' wanderings remarkably colours that ode, and explains the frequent recurrence in it of the name of God as "the Rock." We have false gods, too, spoken of in it, as, "Their rock in whom they took refuge," where the metaphor appears in its completeness (ver. 37). Our psalm goes on with words which contain a further allusion to another part of the same venerable hymn, "And in the shadow of Thy wings will I take refuge," which remind us of the grand image in it of God's care over Israel, as of the eagle bearing her eaglets on her mighty pinions (ver. 11), and point onwards to the still more wonderful saying in which all that was terrible and stern in the older figure is softened into tenderness, and instead of the fierce affection of the mother eagle, the hen gathering her chickens under her wings becomes the type of the brooding love and more than maternal solicitude of God in Christ. Nor can we forget that the only other instance of the figure before David's psalms is in the exquisite idyl which tells of the sweet heroism of David's ancestress, Ruth, on whose gentle and homeless head was pronounced the benediction, "A full reward be given thee of the Lord God of Israel, under whose wings thou art come to trust" (Ruth ii. 12). We may perhaps also see in this clause an extension of the simile which unquestionably lies in the verb, and may think of the strong "sides of the cave," arching above the fugitive like a gigantic pair of wings beneath which he nestles warm and dry, while the short-lived storm roars among the rocks--a type of that broad pinion which is his true defence till threatening evils be overpast. In the past he has sheltered his soul in God, but no past act of faith can avail for present distresses. It must be perpetually renewed. The past deliverances should make the present confidence more easy; and the true use of all earlier exercises of trust is to prepare for the resolve that we will still rely on the help we have so often proved. "I have trusted in Thee" should ever be followed by "And in the shadow of Thy wings will I trust."
The psalmist goes on to fulfil his resolve. He takes refuge by prayer in God, whose absolute elevation above all creatures and circumstances is the ground of his hope, whose faithful might will accomplish its design, and complete His servant's lot. "I will call to God Most High; to God who perfects (His purpose) for me." And then assured hope gleams upon his soul, and though the storm-clouds hang low and black as ever, they are touched with light. "He will send from heaven and save me." But even while this happy certainty dawns upon him, the contending fears, which ever lurk hard by faith, reassert their power, and burst in, breaking the flow of the sentence, which by its harsh construction indicates the sudden irruption of disturbing thoughts. "He that would swallow me up reproaches (me)." With this two-worded cry of pain--prolonged by the very unusual occurrence, in the middle of a verse, of the "Selah," which is probably a musical direction for the accompaniment--a billow of terror breaks over his soul; but its force is soon spent, and the hope, above which for a moment it had rolled, rises from the broken spray like some pillared light round which the surges dash in vain. "God shall send forth His mercy and His truth"--those two white-robed messengers who draw nigh to all who call on Him. Then follows in broken words, the true rendering of which is matter of considerable doubt, a renewed picture of his danger: