The further we advance in the knowledge of nature, the more we find that the most general laws are the simplest.
我们在自然知识中前进得越远，就越发现最普遍的定律是最简单的。
适应力是在快速变化市场中生存的关键。
In all of us，even in good men，there is a lawless wild-beast nature，which peers out in sleep.
人类行为的首要原则是，一个人会做他认为能满足自己欲望的事情。