The existence of the natural world is the same kind of fact as the existence of any proposition.

心理学必须是一门描述的科学，而非解释。

数学是理性的音乐。

There is no death, daughter. People die only when we forget them.

When safety competes with production, safety always wins.

我不后悔我做过的事，我后悔的是有机会时没有做的事。

有时候，保持理智的唯一方法就是稍微疯狂一点。