Perhaps as important is the relation between the existence of solutions to a competitive equilibrium and the problems of normative or welfare economics.
内心守静而不生差错,不让外物扰乱五官,不让五官扰乱内心,这就叫做心中有所得。
喜欢美女和追求富贵的人,不管别人如何都努力去做。而义,是天下的大事,何必先看别人再努力去做呢? 
Dont ever work for someone you dont want to become.
The power of art lies in its ability to make the invisible visible.