Bede : And behold, the men reached out their hands and brought Lot to them and closed the door, and they struck with blindness those who were outside, from the least to the greatest, so that they could not find the door. And the rest is up to the point that Lot said to his sons-in-law: "Get up, leave this place, for the Lord will destroy this city," and he seemed to be speaking jestingly. That the angels closed Lot's door, so that neither he nor anyone from his house could be taken by the Sodomites to destruction, clearly indicates that none of God's elect will be lost to the impiety and persecution of the reprobates, as the Lord says about his sheep: "And I give them eternal life, and they shall never perish, and no one will snatch them out of my hand" (John 10:28). That Lot, having the authority given by the angels, could not bring back to salvation any of the wicked citizens, not even his own relatives or friends, even though he tried very much, signifies that no human effort can add even one soul to the number of the predestined, who were chosen by the Lord before the foundation of the world; for the Lord knows who are his own. Indeed, although the weakness of our condition may hide from us the fate of those who belong to the lot of the elect, we must not cease from caring about our own salvation, nor should we be silent in instructing our neighbors. But, following the example of the blessed Lot, we ought to live chastely and devote ourselves to the correction of those who err, for it is certain that even though we cannot save those predestined to destruction, we do not lose the reward of our kindness, which we extend toward their salvation. — Commentary on Genesis (Hexaemeron)