“Anything that doesn't take years of your life and drive you to suicide hardly seems worth doing.”

Source: Eragon

'Dao lagaao zindagi pe’ (put a stake on your life), Deendayalji’s article, quoted in L.K. Advani, My Country My Life (2008)

Source: The Calhouns: Catherine, Amanda and Lilah

Playboy interview (1996)
Context: If NASA's budgeters could be convinced that there are riches on Mars, we would explode overnight to stand on the rim of the Martian abyss. We need space for reasons we have not as yet discovered, and I don't mean Tupperware. … NASA feels it has to justify everything it does in practical terms.
And Tupperware was one of the many practical products that came out of space travel. NASA feels it has got to flimflam you to get you to spend money on space. That's B. S. We don't need that. Space travel is life-enhancing, and anything that's life-enhancing is worth doing. It makes you want to live forever.

Source: The Phantom Tollbooth

Never Give All The Heart http://poetry.poetryx.com/poems/1545/
In The Seven Woods (1904)
Context: Never give all the heart, for love
Will hardly seem worth thinking of
To passionate women if it seem
Certain, and they never dream
That it fades out from kiss to kiss;
For everything that's lovely is
but a brief, dreamy, kind of delight.
O never give the heart outright,
For they, for all smooth lips can say,
Have given their hearts up to the play.
And who could play it well enough
If deaf and dumb and blind with love?
He that made this knows all the cost,
For he gave all his heart and lost.