>Slartibartfast: I'd far rather be happy than right any day.

>Arthur: And are you?

>Slartibartfast: No. That's where it all falls down of course.

>Arthur: Pity. It sounded like rather a good lifestyle otherwise.

Adulthood, career, marriage, parenthood, nearly everything since I first read The Hitchhiker's Guide to the Galaxy as a (pre?)teen has been slowly, stubbornly learning that this exchange is basically the key to everything.