Delitzsch has well called this psalm "an earthly echo of the seraphic Trisagion," the threefold proclamation of the Divine holiness, which Isaiah heard (Isa. vi. 3). It is, as already noted, a pendant to Psalm xcviii., but is distinguished from the other psalms of this group by its greater originality, the absence of distinct allusion to the great act of deliverance celebrated in them, and its absorption in the one thought of the Divine holiness. Their theme is the event by which Jehovah manifested to the world His sovereign rule; this psalm passes beyond the event, and grasps the eternal central principle of that rule--namely, holiness. The same thought has been touched on in the other members of the group, but here it is the single subject of praise. Its exhibition in God's dealings with Israel is here traced in ancient examples, rather than in recent instances; but the view-point of the other psalms is retained, in so far as the Divine dealings with Israel are regarded as the occasion for the world's praise. The first strophe (vv. 1-3) dwells in general terms on Jehovah's holiness, by which august conception is meant, not only moral purity, but separation from, by elevation above, the finite and imperfect. Ver. 1 vividly paints in each clause the glory reigning in heaven, and its effect on an awestruck world. We might render the verbs in the second part of each clause as futures or as optatives (_shall tremble, shall totter_, or _Let peoples tremble_, etc.), but the thought is more animated if they are taken as describing the result of the theophany. The participial clause "throned on the cherubim" adds detail to the picture of Jehovah as King. It should not, strictly speaking, be rendered with a finite verb. When that vision of Him sitting in royal state is unveiled, all people are touched with reverence, and the solid earth staggers. But the glory which is made visible to all men has its earthly seat in Zion, and shines from thence into all lands. It is by His deeds in Israel that God's exaltation is made known. The psalmist does not call on men to bow before a veiled Majesty, of which they only know that it is free from all creatural limitations, lowliness and imperfections; but before a God, who has revealed Himself in acts, and has thereby made Himself a name. "Great and dread" is that name, but it is a sign of His loving-kindness that it is known by men, and thanksgiving, not dumb trembling, befits men who know it. The refrain might be rendered "It is holy," referring to the name, but vv. 5 and 9 make the rendering _Holy is He_ more probable. The meaning is unaffected whichever translation is adopted.