Enough instead of jealousy

There’s a story about Joseph Heller, the author of Catch-22, finding himself at a party made up of a bunch of Wall Street hedge-fund managers. A man comes up to him and points to a young guy in his 20s. The man says, “See that guy over there? He made more money last year than you will make in a lifetime of writing your books.”
Heller turns to the man and says, “I have one thing that he will never have.”
The man laughs and says, “What?”
Heller says, “Enough.”