做数学就是同时参与创造和发现的行为。
To do mathematics is to engage in an act of creation and discovery simultaneously.
世界是生者的地方,死者在其中没有位置。死者什么都不是。
The strongest is never strong enough to be always the master, unless he transforms strength into right, and obedience into duty.
我对暗示世界的事物感兴趣,而不是暗示个性的事物。
Randomized evaluations can help us understand what works and what doesn't in development.