一个人能遭受的最痛苦的痛苦是洞察很多却无能为力。

Trade between two countries can be mutually beneficial, even if one of them is less efficient in the production of all commodities.

 政治精神倾向于使人们彼此疏远。

Only a life lived for others is a life worthwhile.

我不害怕死亡，我害怕不去尝试。