永不,永不,永不屈服。
思想，在理解和想象的程度上，都是被动的。
做数学就是同时参与创造和发现的行为。
Greatness is not this wonderful, esoteric, elusive, god-like feature that only the special among us will ever taste. It’s something that truly exists in all of us.
The study of mental processes requires both experimental and comparative methods.
To be an artist you have to give up everything, including the desire to be a good artist.