做你自己，别人都已经有人做了。

Perhaps as important is the relation between the existence of solutions to a competitive equilibrium and the problems of normative or welfare economics.

说话不符合事实，是一种罪过

艺术家必须是自由的囚徒。

我在数学上花的时间越多，我就越兴奋。

半夜三更所想的事与清晨八时所想的事情太不一样。