力量不是来自你能做什么，而是来自克服你曾经认为自己无法做到的事情。

The idea that we will make a society where literally everybody is graded, the good at the top, bad at the bottom, exactly done as it should be, is impossible. There are simply too many random factors: accidents, accidents of birth, accidents of things dropping on people's heads, illnesses, etc. We will never get to grade them, never get to grade people as they should.

真相很少是纯粹的，也从不简单。

材料设计的微小改变可以大幅减少环境影响。

最重要的是保持对客户的痴迷。