It's always necessary to know when a stage of one's life has ended. If you stubbornly cling to it after the need has passed, you lose the joy and meaning of the rest. And you risk being shaken to your senses by God.
Here it is about gentlemen of fortune. They lives rough, and they risk swinging, but they eat and drink like fighting-cocks, and when a cruise is done, why, it's hundreds of pounds instead of hundreds of farthings in their pockets.