Success is not final, failure is not fatal: It is the courage to continue that counts.

Everyone has a secret world inside of them. All of the people of the world, I mean. Everybody. No matter how dull and boring they are on the outside, inside them they've all got unimaginable, magnificent, wonderful, stupid, amazing worlds. Not just one world. Hundreds of them.

"In computer science, we are always trying to find the balance between expressiveness and tractability."

I don't think about my voice. I just sing.

The future of computing lies in the integration of hardware and software.

The poor don’t need handouts; they need ladders.