Genesis 19:17

The angels sent for the overthrow of Sodom, though they were eager to hasten the business enjoined upon them, first take care of Lot their host, so that out of regard for his hospitality they might rescue him from the impending destruction by fire. Hear this, you who shut your houses against strangers; hear this, you who shun a guest as though he were an enemy. Lot dwelt in Sodom. We do not read of other good deeds of his; his hospitality alone, arising from habitual practice, is recorded. He escapes the fires, he escapes the flames, for this reason alone, that he threw open his house to guests. The angels entered a hospitable house; the fire entered the houses shut against guests. Let us see, then, what the angels say to their host in return for the offices of hospitality. "On the mountain," he says, "save your soul, lest perhaps you be caught." Lot was indeed hospitable, and, as Scripture bore witness to him, he escaped destruction by receiving the angels into his lodging. But he was not so perfect that, upon coming out of Sodom, he could at once ascend the mountain; for it belongs to the perfect to say: "I have lifted up my eyes to the mountains, from whence shall come my help." This man, therefore, was neither such a one as ought to perish among the Sodomites, nor was he so great that he could dwell with Abraham in the loftier places. For if he had been such, Abraham would never have said to him: "If you go to the right, I will go to the left, or if you go to the left, I will go to the right," nor would the dwellings of Sodom have pleased him. He was, therefore, a kind of middle sort between the perfect and the lost. And knowing that it was not suited to his strength to ascend the mountain, he devoutly and humbly excuses himself, saying: "I cannot be saved on the mountain, but behold this city is small, here I shall be saved, and it is not small." And having entered Segor, the small city, he is saved in it. And after this he ascended into the mountain with his daughters. For he could not have ascended into the mountain from Sodom, although it is written of the land of Sodom, before it was overthrown, at the time when Lot chose it for his dwelling, that it "was like the paradise of God and like the land of Egypt." And yet — to make use of a small digression — what likeness can there seem to be between the paradise of God and the land of Egypt, that Sodom…

For as it was in the days of Noah, so shall also the coming of the Son of man be. For as they were in the days before the flood, eating and drinking, marrying and giving in marriage, until Noah entered into the ark, and they knew not until the flood came and took them all away, so shall also the coming of the Son of man be. For those who understand the plain text of the present words, whether they wish to understand it spiritually or simply, it is consistent to say concerning the consummation of this world that "it shall come suddenly," like one who has already fallen sick beforehand with a sickness fit to make manifest his coming corruption. For this is shown especially from what he says, that the coming of the Son of man will be like the days of Noah; for then all things that were upon the earth suddenly perished. But whoever wishes to say that the consummation of the world will happen gradually will say that likewise it happened in the days of Noah. For with the rain descending for forty days and forty nights, it followed that those first perished who dwelt in the lower parts of the earth, and after them those who dwelt somewhat in the higher parts, and thus last of all those who dwelt in the highest mountains. So too (he says) in the consummation of the world, when the fire has descended, it will indeed begin from the more elevated places and gradually descend to the lower. But Luke, subjoining also the similitude of the fire of Sodom, gives us occasion to understand that the consummation is to come suddenly. But someone will say that by this it is declared that that rain, or that fire, did not happen according to the order of nature, but on account of the abundance of the sins of men. In two ways, then, is the coming corruption of the world reckoned: in one way according to a natural descent of fire, in another according to the judgment of God. But the Gentiles do not say that those sins were the burning, or the cause of that burning, but that it was the power of fire. The divine discourses, however, teach that all things are held and governed by God, and they do not blame the violence of fire, but proclaim it the will of God — of God who saves upon the earth those who are worthy of salvation in it, but destroys those in whom, on account of the abundance of iniquity, "charity grows cold." For the comparison with the fire of Sodom teaches most…