生活的目的不是快乐。它是有用、可敬、富有同情心，让你活得有意义且活得好。

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.

All great truths begin as blasphemies.

"The future is about making a difference."