Ambrose of Milan — as excerpted in the Catena Aurea on Luke 17:31-33

“Because good men must needs on account of the wicked be sore vexed in this world, in order that they may receive a more plentiful reward in the world to come, they are here punished with certain remedies, as it is here said, In that day, &c. that is, if a man goes up to the top of his house and rises to the summit of the highest virtues, let him not fall back to the grovelling business of this world.”