知识的唯一来源是经验。

大国总是在寻找机会以牺牲对手为代价来获取权力，如果他们认为使用武力会带来利益，他们就会使用武力。

You will never be able to escape from your heart. So it's better to listen to what it has to say. That way, you'll never have to fear an unanticipated blow.

有所成就是人生唯一的真正的乐趣。