The best mathematics is not just rigorous; it is also elegant.

To teach how to live without certainty and yet without being paralyzed by hesitation is perhaps the chief thing that philosophy， in our age， can do for those who study it.

Quality is never an accident; it is always the result of intelligent effort.

充满爱的心是最真实的智慧。

最危险的毒药是成就感。解药是每天早上都像个初学者一样思考。

追求真理是一场永无止境的旅程，而非终点。