The "height" to which ver. 18 triumphantly proclaims that God has gone up, can only be Zion. To take it as meaning the heavenly sanctuary, as in Psalm vii. 7 it unquestionably does, is forbidden by the preceding verses. Thither the conquering God has ascended, as to His palace, leading a long procession of bound captives, and there receiving tribute from the vanquished. Assyrian slabs and Egyptian paintings illustrate these representations. The last clause has been variously construed and understood. Is "Yea, even the rebellious" to be connected with the preceding, and "among" to be supplied, so that those once rebellious are conceived of as tributary, or does the phrase begin an independent clause? The latter construction makes the remainder of the verse run more intelligibly, and obviates the need for supplying a preposition with "the rebellious." It still remains a question whether the last words of the clause refer to God's dwelling among the submissive rebels, or to their dwelling with God. If, however, it is kept in view that the context speaks of God as dwelling in His sanctuary, the latter is the more natural explanation, especially as a forcible contrast is thereby presented to the fate of the "rebellious" in ver. 6. They dwell in a burnt-up land; but, if they fling away their enmity, may be guests of God in His sanctuary. Thus the first half of the psalm closes with grand prophetic hopes that, when God has established His abode on Zion, distant nations shall bring their tribute, rebels return to allegiance, and men be dwellers with God in His house.
In such anticipations the psalm is Messianic, inasmuch as these are only fulfilled in the dominion of Jesus. Paul's quotation of this verse in Eph. iv. 8 does not require us to maintain its directly prophetic character. Rather, the apostle, as Calvin says, "deflects" it to Christ. That ascent of the ark to Zion was a type rather than a prophecy. Conflict, conquest, triumphant ascent to a lofty home, tribute, widespread submission, and access for rebels to the royal presence--all these, which the psalmist saw as facts or hopes in their earthly form, are repeated in loftier fashion in Christ, or are only attainable through His universal reign. The apostle significantly alters "received among" into "gave to," sufficiently showing that he is not arguing from a verbal prophecy, but from a typical fact, and bringing out the two great truths, that, in the highest manifestation of the conquering God, the conquered receive gifts from the victor, and that the gifts which the ascended Christ bestows are really the trophies of His battle, in which He bound the strong man and spoiled his house. The attempt to make out that the Hebrew word has the extraordinary doubled-barrelled meaning of _receiving in order to give_ is futile, and obscures the intentional freedom with which the apostle deals with the text. The Ascension is, in the fullest sense, the enthronement of God; and its results are the growing submission of nations and the happy dwelling of even the rebellious in His house.
The rapturous emphasis with which this psalm celebrates God's entrance into His sanctuary is most appropriate to Davidic times.
The psalm reaches its climax in God's enthronement on Zion. Its subsequent strophes set forth the results thereof. The first of these, the fifth of the psalm (vv. 19-23), suddenly drops from strains of exultation to a plaintive note, and then again as suddenly breaks out into stern rejoicing over the ruin of the foe. There is wonderful depth of insight and tenderness in laying side by side the two thoughts of God, that He sits on high as conqueror, and that He daily bears our burdens, or perhaps bears us as a shepherd might his lambs.
Truly a Divine use for Divine might! To such lowly offices of continual individualising care will the Master of many legions stoop, reaching out from amid their innumerable myriads to sustain a poor weak man stumbling under a load too great for him. Israel had been delivered by a high hand, but still was burdened. The psalmist has been recalling the deeds of old, and he finds in them grounds for calm assurance as to the present. To-day, he thinks, is as full of God as any yesterday, and our "burdens" as certain to be borne by Him, as were those of the generation that saw His Sinai tremble at His presence. To us, as to them, He is "a God of deliverances," and for us can provide ways of escape from death. The words breathe a somewhat plaintive sense of need, such as shades our brightest moments, if we bethink ourselves; but they do not oblige us to suppose that the psalm is the product of a time of oppression and dejection. That theory is contradicted by the bounding gladness of the former part, no less than by the confident anticipations of the second half. But no song sung by mortal lips is true to the singer's condition, if it lacks the minor key into which this hymn of triumph is here modulated for a moment.