我反抗，故我在。

当且仅当所有投资者都持有均值-方差有效的投资组合时，市场组合才是有效的。

Fashion is a form of imitation and so of social equalization, but, paradoxically, in changing incessantly, it differentiates one time from another and one social stratum from another.

适应力是任何行业长期生存的基石。

"Books are the windows to other realities."

There is nothing more deceptive than an obvious fact.

写作就像性爱。首先你为爱而做，然后为朋友而做，最后为钱而做。