做出伟大工作的唯一方法就是热爱你所做的事情。

"The only thing that interferes with my learning is my education."

Own only what you can always carry with you: know languages, know countries, know people. Let your memory be your travel bag.

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

爱是一种痛苦。如果你感觉不到痛苦，那就不是爱。