"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."
数学家是能在定理之间找到类比的人;更好的数学家是能在证明之间看到类比的人;而最好的数学家是能注意到理论之间类比的人。
经验是我们给自己的错误起的名字。
空容器发出的声音最大。
If you take care of the soil, the soil will take care of you.