Adam Clarke on Job 26:9

He holdeth back the face of his throne - Though all these are most elegant effects of an omniscient and almighty power, yet the great Agent is not personally discoverable; he dwelleth in light unapproachable, and in mercy hides himself from the view of his creatures. The words, however may refer to those obscurations of the face of heaven, and the hiding of the body of the sun, when the atmosphere is laden with dense vapours, and the rain begins to be poured down on the earth.