"The thing about happiness is that you only know you had it when it's gone.
I mean, you may think to yourself that you're happy, but you don't really believe it.
You focus on the petty ♥♥♥♥♥♥♥♥, or the next job, or whatever.
It's only looking back, by comparison with what comes after, that you really understand that's what happiness felt like."

- Kellogg, Fallout 4