We don't inherit the earth from our ancestors; we borrow it from our children.
A mathematician is a device for turning coffee into theorems.
对自由民主最严重的威胁来自内部,来自制度的衰败和对它们的信任的丧失。
每一本书都是一次旅程,每一次旅程都改变我们。
路途再近,你不走,也不会到达。事情再小,不去做也不可能完成。