Thinking about language, while thinking _in_ language, leads to puzzles and paradoxes.

"Half genius and half buffoon," Freeman Dyson ... wrote. ... [Richard] Feynman struck him as uproariously American-unbuttoned and burning with physical energy. It took him a while to realize how obsessively his new friend was tunneling into the very bedrock of modern science.

The Internet is like a town that leaves its streets unmarked on the principle that people who don't already know don't belong

Ideas that require people to reorganize their picture of the world provoke hostility.

For [Richard] Feynman, the essence of the scientific imagination was a powerful and almost painful rule. What scientists create must match reality. It must match what is already known. Scientific creativity is imagination in a straitjacket.

I can't remember the last book that taught me so much, and so well, about what it means to be human.

We say that time passes, time goes by, and time flows. Those are metaphors. We also think of time as a medium in which we exist.