出自先秦《荀子·哀公》。鸟被逼得走投无路之时就会用嘴啄人，兽到困窘之时就会用爪抓人，人到穷困潦倒之时就会设计骗人。以鸟兽困窘之时的行为为喻，说明人到穷困潦倒之时便会放弃道德操守的原因。

持续改进不仅仅是一个过程，它是一种应该渗透到我们组织各个层面的思维方式。

The architecture of the human mind is better adapted to the Pleistocene than to the modern world.

You cannot always control what goes on outside. But you can always control what goes on inside.

睡眠，那些小小的死亡切片——我多么厌恶它们。

The beauty of mathematics lies not only in its ability to describe the world but also in its power to reveal the hidden structures that govern it.

数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。