Leaders are more powerful role models when they learn than when they teach.

The secondary rules are those that provide for the creation, alteration, and extinction of primary rules.

真正的竞争不在公司之间，而在产品和服务之间。

数学推理可以相当系统地看作是两种能力的结合运用，我们可以称之为直觉和独创性。

The earth's resources are finite, but human ingenuity is not.

You think when you wake up in the mornin yesterday don't count. But yesterday is all that does count.

The only thing that matters is the truth.

The world is moving so fast these days that the man who says it can't be done is generally interrupted by someone doing it.