世界是一个谜，我们都是侦探。

The only information we can legitimately derive from aesthetic and moral experiences is information about our own mental and physical make-up.

The peculiar evil of silencing the expression of an opinion is that it is robbing the human race； posterity as well as the existing generation； those who dissent from the opinion， still more than those who hold it.

人们并不总是理性的，他们的非理性行为可能会产生重大的经济后果。