墨子说：言论如果能够付诸行动的就可以讲；不能够付诸行动的就别多说。言论不能付诸行动的而常讲，这就是卖弄口才了。

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

被锁链束缚往往比自由更安全。

I'm interested in those characters who are struggling with something, who are trying to figure something out.