数学中最重要的是要有良好的直觉。

I will keep creating art until the day I die.

La historia de un país no se puede entender sin conocer su literatura.

——《大总统复参议会论国旗函》，1912年2月3日

不要自怨自艾，因为这解决不了任何问题。

RESOLUTION. Resolve to perform what you ought; perform without fail what you resolve.

I have always wished for my computer to be as easy to use as my telephone; my wish has come true because I can no longer figure out how to use my telephone.

Every breakthrough starts with a question.

最伟大的定理往往始于简单的猜想，源于直觉。