L-函数的算术是解开数论秘密的关键。

It must be remembered that while sympathy with joy intensifies the sum of joy in the world., sympathy with pain does not really diminish the amount of pain. It may make man better able to endure evil, but the evil remains.

一纸文凭不见得就可以造就一个人，正如同牢狱生涯也不见得会打垮每一个人。

伟大的本质在于认识到美德就足够了。