知道自己不知道什么比聪明更有用。

A nation's memory is its most contested territory.

Mathematics is not a deductive science—that's a cliché. When you try to prove a theorem, you don't just list the hypotheses and then start to reason. What you do is trial and error, experimentation, guesswork.

鸟快要死的时候，叫声是悲切的，人快要死的时候，说话是善良的。

"The world is full of obvious things which nobody by any chance ever observes."

技术应该为人类服务，而不是反过来。