The great epochs of our life are the occasions when we gain the courage to rebaptize our badness as the best in us.

Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.

The most important thing is to be able to think.

When a child asks an endless string of “why？” questions， the smartest reply is， “I don’t know， what do you think？”

Every application of technology must be based on sustainability.

人是唯一拒绝成为自己的生物。

想治理国家，首先要先去治民。治民要先正己，做好治家的工作，把自家子弟教育好了，自己就会以身作则；只有做到先正自己，才能在治民方面起到带头作用。只有先做好自己，才能为别人带好头和榜样；只有先身体力行才能有好作用榜样示范作用。这才是真正有意义的治理国家的好方法。只有先立好自己的身才能对社会起到好的表率作用。