Be the change you wish to see in the world.

Generations to come will scarcely believe that such a one as this walked the earth in flesh and blood.

The security dilemma is a fundamental feature of international politics, as states' efforts to increase their own security often decrease the security of others.

成功的最好方式是帮助别人成功。

我们生产的每一桶石油都应着眼于最小化我们的足迹。

释义：从天下的角度看，应遵循天下的公理，天下不是某一姓的私有财产。

书籍是探索世界、理解不同观点和发展同理心的一种方式。