In it or not?

"At the first glance, happiness seems a little like love: if you have to ask whether you are in it or not, you are probably not" We'll continue with detachment and happiness, not with love though.

I'd much rather be happy than right any day.

Slartibartfast: Perhaps I'm old and tired, but I think that the chances of finding out what's actually going on are so absurdly remote that the only thing to do is to say, "Hang the sense of it," and keep yourself busy. I'd much rather be happy than right any day. 
Arthur Dent: And are you? 
Slartibartfast: Ah, no. 
[laughs, snorts] 
Slartibartfast: Well, that's where it all falls down, of course.