"The joy of reading is discovering that you are not alone."

"The true alchemists do not change lead into gold; they change the world into words."

自然实验是理解现实世界中因果关系的强大工具。

A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between theories and the best mathematician can notice analogies between analogies.

You can’t let success get to your head and failure to your heart.

真理是永恒不变的。