真正的喜悦精神、崇高感、超越人类的感觉，这是最高卓越的试金石，在数学中肯定能找到，就像在诗歌中一样。
The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.
Success is not final, failure is not fatal.
El arte de escribir consiste en decir mucho con pocas palabras.
如果你不能理解某人为什么要做某事，那么看看他们行为的后果，不管他们可能是什么，然后从他们的后果中推断出动机。
Love is the principle of unity and cohesion, Strife is the force of separation and disintegration.”