The moment you doubt whether you can fly, you cease for ever to be able to do it.

The only way to learn a new programming language is by writing programs in it.

对付一个不自由的世界唯一的方法就是变得如此绝对自由，以至于你的存在本身就是一种反叛行为。

To succeed, you need to create value for others, and that requires understanding what others value.

数学中最重要的是理解概念，而不仅仅是记忆公式。