When you get an invitation to do something in the future， ask yourself: would you accept this if it was scheduled for tomorrow？ Not too many promises will pass that immediacy filter.

人生重要的不是胜利，而是战斗;不是要打败对手，而是要打得好。

世界的整个问题在于愚蠢的人和狂热分子总是对自己如此确定，而聪明的人则充满疑虑。

学习不仅仅是知识的积累，而是理解的转变。