It is not necessary to take life too seriously. You will never get out of it alive.

When public speaking， pause frequently. Pause before you say something in a new way， pause after you have said something you believe is important， and pause as a relief to let listeners absorb details.

为自己的原则而战比实践这些原则要容易。

一个好的数学家是懒惰的，但要以建设性的方式。