在数学中，提出问题的艺术必须比解决问题更有价值。

The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter.

The distinction between mind and matter applies only to logical constructions out of sense-contents.

拍卖研究让我们更广泛地理解市场的运作。

历史不会重复，但会押韵。

It is so hard to believe because it is so hard to obey.

做出伟大工作的唯一方法是热爱你所做的事情。

对付敌人的最好武器就是另一个敌人。