世界上最伟大的事情是知道如何属于自己。
The greatest thing in the world is to know how to belong to oneself.
The rise of China and the resurgence of Russia have challenged the idea that liberal democracy is the only viable form of government.
乐观主义者认为这是所有可能世界中最好的一个。悲观主义者则担心这是真的。