Happiness is not something ready made. It comes from your own actions.
The only power any government has is the power to crack down on criminals. Well, when there aren't enough criminals, one makes them. One declares so many things to be a crime that it becomes impossible for men to live without breaking laws.
You have to be willing to fail to be successful.
The best solutions often come from listening—to nature, to science, and to the people on the ground.
在数学中，你不理解事物。你只是习惯了它们。
I wanted to write a book about memory because I think it's one of the most fascinating things about being human.