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

吃得更好，生活更好

未来属于那些相信自己梦想之美的人。

常想到会悔恨终生，就不能不尽孝心；常想到度日的艰难，就不得不节约费用；常想到人的生命脆弱，就不得不珍惜心神；常想到世态人情，就不得不立志奋发；常想到法网恢恢，疏而不漏，就不能让自己胡作非为；常想到生命易失，就不得不忍气耐性。

A sober looks shows that just have the world gotten to be a better place after all; it is also grown a bit worse at the exact same rate.; a one step up, a one step back sort of cosmic balance between forward progress, and cultural retreat, that puts man kind on a bell curve of existence.

今天的挑战就是明天的机遇——前提是我们以正确的心态面对它们。

没有任何物理量可以永远呈指数级变化。