没有矛盾的人生不值得书写。

Corn is a necessary, silver is only a superfluity.

Reputation is what other people know about you. Honor is what you know about yourself.

One can choose to go back toward safety or forward toward growth. Growth must be chosen again and again; fear must be overcome again and again.

Innovation in science often comes from looking at old problems in new ways.

政府开支的第一条规则：为什么只建一个，当你可以用两倍的价格建两个时？