谁的快乐最廉价，谁就是最富有的人。
A man is rich in proportion to the number of things which he can afford to let alone. That man is the richest whose pleasures are the cheapest.
All human beings have three lives: public, private, and secret.
我们都在寻找某些东西，无论我们是否承认，这种寻找定义了我们。
The primary rules of obligation are those that require or forbid certain actions.
One of the greatest ways to avoid trouble is to keep it simple...the system often goes out of control.
I don’t let anyone define me. I define myself.
True innovation often comes from questioning what everyone else accepts as fact.