The Gospel reading was taken from Matthew 24. Jesus said to his disciples that the coming of the Son of Man would be as it was in the days of Noah. People were eating and drinking, marrying and giving marriage, up to the day Noah entered the ark. The flood came and carried them all away. He therefore told his disciples to stay awake and be prepared, for he would come at an hour they did not expect.
It's critical that we be ready always, joyfully anticipating the coming of the Lord.