You have to fight through some bad days to earn the best days of your life.

I wanted to write a book about memory because I think it's one of the most fascinating things about being human.

The speed of learning determines the speed of growth.

我们生来都继承了一定的时间，我们必须学会明智地使用它。

自然实验可以为经济问题提供有价值的见解。

女人对人生的透彻来得晚，这就是男女之间的差异。