In mathematics, as in life, the most profound discoveries often come from asking the simplest questions.
恩惠授予个人，是仁的危害；轻率从事而无担当，是义的危害；伪装恭敬的仪态，是礼的危害；细察而多疑，是智的危害；不能坚守诚信，是信的危害。
世界是一个问号。
哲学上的错误比数学上的错误要严重得多。
The only way to do great work is to love what you do.