"Sometimes you have to be apart from people you love, but that doesn't make you love them any less. Sometimes you love them more."

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.

Progress requires both courage and humility.

树叶的低语比董事会的辩论更有智慧。

生活是世界上最罕见的事情。大多数人只是存在，仅此而已。

The world is a book, and those who do not travel read only one page.