矿工的安全永远不应该用成本效益分析来衡量。

Profit is important, but it should never come at the expense of our principles.

"Manchmal muss man weit reisen, um zu verstehen, was zu Hause passiert."

欲望不是要被理解的东西。它是要被忍受的东西。

时机未到，却着急去做，就是急躁；时机成熟，却还不去做，就是愚蠢。

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.

改变是不可避免的，但成长是可选的。

充满爱的心是最真实的智慧。