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

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

——〈在北京基督教等六教会欢迎会的演说〉，1912年9月5日

The limits of my language mean the limits of my world.

质量是免费的。它不是礼物，但它是免费的。花钱的是那些不质量的东西——所有那些没有第一次就把工作做好的行为。

The key to solving complex problems is to break them down into manageable pieces.

The sublimity of administration consists in knowing the proper degree of power that should be exerted on different occasions.