最终，我们都是孤独的，我们必须独自面对我们行为的后果。

Mathematics is the key to understanding the universe.

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

从错误中学习，但不要让它们定义你。

写作是一种爱的方式，一种抚摸文字直到它们变成不仅仅是文字的方式。

On marketing: "In the old world， you devoted 30% of your time to building a great service and 70% of your time to shouting about it. In the new world， that inverts."