Psychology must be a practical science, concerned with the how and why of mental operations.

吃饭不可不嚼便咽，走路不可不看便走，话不可不考虑便信口乱说，事不可不计划就贸然去做，衣服不能随便就脱，钱财不能随便据为已有，怒气不可不忍而任意发作，朋友不可不加选择地乱交。

The market can stay irrational longer than you can stay solvent.

写作不仅仅是表达思想，更是创造一个让这些思想得以生存和呼吸的空间。