重要的东西用眼睛是看不到的……就好比花一样。假如你喜欢某个行星上的一朵花，在夜晚仰望星空的时候心情就会很愉快，感觉所有的行星都开满了花。

We are to remember that we are not to take anything with us out of this world, and that it is how we have conducted ourselves here that will matter in the end.

The search for reciprocity laws is a fundamental theme in the history of mathematics.