经济理论提供工具，但现实世界的测试会完善它们。

The more determinedly I exist, as myself, within the conditions of the time, the more clearly I shall hear the language of the past, the nearer I shall feel the breath of universal history.

I want to liberate America from fear. I want people to be afraid of the things that are really scary, like war and famine, not their neighbor because he has a different religion.

"A book is a conversation with the dead."