The greatest wisdom is knowing that you know nothing.

The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.

You can't build an empire without making a few enemies along the way.

人的自由是他的限制。

盖亚假说是一种将地球视为有生命的系统的方式，不是情感上的，而是作为一个系统。

Happiness is holding someone in your arms and knowing you hold the whole world.

我可以放弃所有真理，但不能放弃对真理的追寻。

真正的发现之旅不在于寻找新的风景，而在于拥有新的眼光。