人们不禁会感到这些数学公式拥有独立的存在和自己的智慧，它们比我们更聪明，甚至比它们的发现者更聪明。

"Books are empathy machines. They allow us to step into someone else's shoes and see the world through their eyes."

The theory of economic development is the study of how the economic system generates the forces which incessantly transform it.

I think that the most important thing in life is to be true to yourself.