Numbers are limits, and perfection doesn't have limits.

The only way to avoid all frightening choices is to leave society and become a hermit, and that is a frightening choice.

You've given up your whole life to be the person you are now. Is it worth it?

So much of what we said sounded crazy, yet none of it was false... as if two theoretical physicists stood on stage to say that when we travel near lightspeed, we get younger than nontravellers; that a mile of space next to the sun is differnt than a mile of space next to the earth because the sun-mile space is curved more than the the earth-mile. Silly ideas, worth the admission price in smiles, but they're true. Is high-energy physics interesting because it's true or because it's crazy?

Get this in mind early: We never grow up.

If you love someone, set them free. If they come back they're yours; if they don't they never were.

That which most concerns and worries you - your survival - is the only certainty you have.