西方赢得了冷战，但它没有赢得和平。

你必须是自己幸福的最好判断者。

Mathematics is the language in which the universe writes its deepest secrets.

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

职业生涯是攀爬架，不是梯子。