A good novel tells us the truth about its hero, but a bad novel tells us the truth about its author.
一本好小说告诉我们关于其主人公的真相，而一本坏小说告诉我们关于其作者的真相。
The greatest problem for mathematicians now is probably the Riemann Hypothesis.
书籍是最安静、最恒久的朋友；它们是最易接近、最睿智的顾问，也是最耐心的老师。