11. Tremble. This repetition is not unnecessary, but states more fully what he formerly said; for when men are asleep, they are not easily aroused by the voice of the prophets, and therefore it is needful to cry aloud and reprove them continually. And thus, by adding one threatening to another, or by repeating the same threatenings, he shews how great is the stupidity of men, when they have once been blinded by prosperity; for they can scarcely endure any longer to hear the warnings which God addresses to them. Men are undoubtedly more in danger from prosperity than from adversity; for when matters go smoothly with them, they flatter themselves, and are intoxicated by their success; and therefore it was necessary to deal more sharply with the Jews, in order to shake off that slothfulness. This exhortation of the Prophet ought to be explained in the future tense; as if he had said, “You shall at length tremble, for the rest which you now enjoy will not be perpetual.”
By bidding them make themselves bare, and gird sackcloth on their loins, he describes the manner and dress of mourners. Whenever they were visited by deep adversity, they put on sackcloth, made bare the other parts of their body, and by dress, and attitude, and every method, manifested their grief. He desires women to put on sackcloth and other expressions of mourning, instead of the luxuries and pleasures in which they eagerly indulged.