幸福的秘诀是面对这个世界很可怕的事实。

粒子的概念只是近似的，并且只有在动量较小的极限下才有意义。

In a way, if you like, at one end of the spectrum of sympathy, you've got the tabloid newspaper. At the other end of the spectrum, you've got tragedy and tragic art. And I suppose I'm arguing that we should learn a little bit about what's happening in tragic art. It would be insane to call Hamlet a loser. He is not a loser, though he has lost. And I think that is the message of tragedy to us, and why it's so very, very important, I think.

君子以品德不修为耻，不以被污蔑为耻；以不诚信为耻，不以不被信任为耻；以无能耐为耻，不以不被任用为耻。

To be free is not to have the power to do anything you want, but to have the power to do what is right.

The real challenge is not growing more food, but growing it smarter with less waste.