Gospel (Lk 17,26-37) - At that time, Jesus said to his disciples: «As it was in the days of Noah, so it will be in the days of the Son of man: they ate, they drank, they married, they were given in marriage, until the day that Noah entered the ark and came. the flood and killed them all. As also happened in the days of Lot: they ate, they drank, they bought, they sold, they planted, they built; but, on the day Lot left Sodom, fire and brimstone rained from heaven and killed them all. This will happen on the day the Son of Man is revealed. »On that day, whoever finds himself on the terrace and has left his things in the house, must not go down to get them; so whoever is in the field must not go back. Remember Lot's wife. Whoever tries to save his life will lose it; but whoever loses it will keep it alive. I tell you: on that night, two will be found in the same bed: one will be taken away and the other left; two women will be grinding in the same place: one will be taken away and the other left." Then they asked him: "Where, Lord?". And he said to them, “Where the corpse is, there the vultures will also gather together.”

The commentary on the Gospel by Monsignor Vincenzo Paglia

Jesus warns the disciples because "on that day" and "on that night" we must be vigilant. And vigilance involves freedom from attachment to things and to one's own traditions. Yes, detachment from the world, from things, from possessions, small or large, it doesn't matter, in short from "stuff", is a determining condition for welcoming the coming kingdom of God into the heart. And the detachment must also take place for what we consider our supreme good: life, which in truth we often waste or throw away. Jesus clarifies well the way of salvation or, if you want, the way of understanding the meaning of our existence: «Whoever tries to save his life will lose it; but whoever loses it will keep it alive." What does it mean? The evangelist Luke has already reported these words previously with the addition "for my sake". What Jesus asks of the disciple is to spend his life, his whole life, to serve the Gospel, to follow Jesus and take part in his plan of love. This is how we can keep it alive, or rather make it grow. If we remain with the Lord, we will reap the fruits of the kingdom with him. He, however, who remains alone with himself, that is, who spends his life only for himself, scatters and collects nothing. When the appointed day arrives – Jesus continues to say – it will not count.