Gregory the Great, on Zeph 1:15

“That day is a day of wrath, a day of tribulation and distress, a day of calamity and misery, a day of darkness and obscurity, a day of clouds and whirlwinds,”

“But let them hear how the prophet Zephaniah holds out over them the power of divine rebuke, saying, Behold the day of the Lord cometh, great and horrible, the day of wrath, that day; a day of darkness and gloominess, a day of cloud and whirlwind, a day of trumpet and clangour, upon all fenced cities, and upon all lofty corners. For what is expressed by fenced cities but minds suspected, and surrounded ever with a fallacious defence; minds which, as often as their fault is attacked, suffer not the darts of truth to reach them? And what is signified by lofty corners (a wall being always double in corners) but insincere hearts; which, while they shun the simplicity of truth, are in a manner doubled back upon themselves in the crookedness of duplicity, and, what is worse, from their very fault of insincerity lift themselves in their thoughts with the pride of prudence? Therefore the day of the Lord comes full of vengeance and rebuke upon fenced cities and upon lofty corners, because the wrath of the last judgment both destroys human hearts that have been closed by defences against the truth, and unfolds such as have been folded up in duplicities. For then the fenced cities fall, because souls which God has not penetrated will be damned. Then the lofty corners tumble, because hearts which erect themselves in the prudence of insincerity are prostrated by the sentence of righteousness.”

Imported from an open dataset — not yet checked against the printed edition.