A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty.

Encore un effort, citoyens de l’Europe, et vous serez européens!

This result is too beautiful to be false; it is more important to have beauty in one’s equations than to have them fit experiment.

I didn’t do it. Nobody saw me do it. You can’t prove it.

Some dance to remember, some dance to forget.