居身平安之境要考虑危难之时，处身太平盛世要想到乱世之日。

威胁我们文明的99%的麻烦都来自于过于乐观，因此我们应该有一个更加保守的会计制度。

We must accept finite disappointment, but we must never lose infinite hope.

The stranger is close to us, insofar as we feel between him and ourselves common features of a national, social, occupational, or generally human, nature. He is far from us, insofar as these common features extend beyond him or us, and connect us only because they connect a great many people.

如果你不喜欢某件事，就去改变它。如果你无法改变它，就改变你的态度。