The arithmetic of L-functions is a key to unlocking the secrets of number theory.

The more you do, the more you learn. The more you learn, the more you can do.

幸福者的世界与不幸者的世界是完全不同的。

Never use a credit card for credit. The only kind of credit， or debt， that is acceptable is debt to acquire something whose exchange value is extremely likely to increase， like in a home. The exchange value of most things diminishes or vanishes the moment you purchase them. Don’t be in debt to losers.

希望是脆弱的，但它也是我们拥有的最强大的力量。