建筑是关于如何浪费空间的艺术。

By used books. They have the same words as the new ones. Also libraries.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.

思想就是一切；你想什么，就会成为什么。