No man really knows about other human beings. The best he can do is to suppose that they are like himself.

The greatest glory in living lies not in never falling, but in rising every time we fall.

数学是一种超越文化和语言障碍的通用语言。

Marine conservation isn't a constraint on business—it's the foundation of its future.

The quality of ideas seems to play a minor role in mass movement leadership. What counts is the arrogant gesture, the complete disregard of the opinion of others, the singlehanded defiance of the world.

To be alive is to be in a state of constant rebellion.