Charles H. Spurgeon on Psalms 104:2

Like a curtain. Because the Hebrews conceived of heaven as a temple and palace of God, that sacred azure was at once the floor of his, the roof of our, abode. Yet I think the dwellers in tents ever loved best the figure of the heavenly tent. They represent God as daily spreading it out, and fastening it at the extremity of the horizon to the pillars of heaven, the mountains: it is to them a tent of safety, of rest, of a fatherly hospitality in which God lives with his creatures. Herder, quoted by Perowne.