人是唯一会在同一块石头上绊倒两次的动物。

Movement never lies.

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 whole world is a series of miracles, but we're so used to them we call them ordinary things."

当信息不完美或市场不完整时，市场本身不会产生有效的结果。