应对不自由世界的唯一方法是变得如此绝对自由，以至于你的存在本身就是一种反抗。

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。

我是一个非常积极的思想者，我认为这是我在困难时刻最帮助我的东西。

The greatest breakthroughs often come from unexpected places.

The capacity of the human mind for forming and manipulating symbols is what sets us apart from other animals.

一个数学家的真正价值在于他们留下的问题。

The key to successful investing is to have a long-term perspective and to stick to your investment plan.

最好的书是读完后仍长久留在你心中的书。

Documentation is like term insurance: It satisfies because almost no one who subscribes to it depends on its benefits.

The spirit of science is the spirit of seeking truth and being pragmatic.