每个人都有不为世人所知的秘密悲伤；我们常常称一个人冷漠，其实他只是悲伤。

最多人的最大幸福是衡量对与错的标准。

Virtually no idea is too ridiculous to be accepted, even by very intelligent and highly educated people, if it provides a way for them to feel special and important. Some confuse that feeling with idealism.

Quiet people have the loudest minds.

关键是专注于自己的道路。

国际体系的无政府性质迫使国家争夺权力。