每一个数学问题都是一个等待解决的谜题，每一个解答都是向理解现实结构迈进的一步。

Failure gave me an inner security that I had never attained by passing examinations. Failure taught me things about myself that I could have learned no other way. I discovered that I had a strong will, and more discipline than I had suspected; I also found out that I had friends whose value was truly above the price of rubies.

经济不平等不仅是一个道德问题，也是一个经济问题。