Ask HN: What quote most inspires you?

I'm looking to compile some amazing quotes... please share one :)

and please vote up! Thanks!

"Rest, rest, perturbed spirit!" -Hamlet, Act I, Scene V

The following quote didn't really inspire me. But I still love it because I think what it says is really true.

“Love is a temporary madness, it erupts like volcanoes and then subsides. And when it subsides, you have to make a decision. You have to work out whether your roots have so entwined together that it is inconceivable that you should ever part. Because this is what love is. Love is not breathlessness, it is not excitement, it is not the promulgation of promises of eternal passion, it is not the desire to mate every second minute of the day, it is not lying awake at night imagining that he is kissing every cranny of your body. No, don't blush, I am telling you some truths. That is just being "in love", which any fool can do. Love itself is what is left over when being in love has burned away, and this is both an art and a fortunate accident.”― Louis de Bernières, Captain Corelli's Mandolin

“If it falls to your lot to be a street sweeper, sweep streets like Michelangelo painted pictures, sweep streets like Beethoven composed music ... Sweep streets like Shakespeare wrote poetry. Sweep streets so well that all the host of heaven and earth will have to pause and say: Here lived a great street sweeper who swept his job well.” -- Martin Luther King Jr.

Some of the world's greatest feats were accomplished by people not smart enough to know they were impossible. ~Doug Larson