Writing is a way of being, a way of existing in the world.

出自北齐·颜之推《颜氏家训·勉学》。不得，不能、不可。雌黄，矿物名，可作颜料，古代用以涂改文字，后引申为信口更改、随便乱说。没有读够一定数量的书，对前人的见解没有彻底了解，是不能随便乱下结论、乱发议论的。书要多读、话要谨慎；应当谦虚向学，不可妄自尊大。

What I remember above all about Harvard was being in the midst of so much energy and intelligence. It could be exhilarating, intimidating, sometimes even discouraging, but always challenging. It was an amazing privilege…and though I left early, I was transformed by my years at Harvard, the friendships I made, and the ideas I worked on.

物理学的美丽在于它能够用简单的方式解释复杂的事物。

如果一个人不完全愿意随时离职，就不适合担任公职......

我不会假装在冠状病毒之前一切都很完美。

There is no such thing as a moral or an immoral book. Books are well written, or badly written. That is all.