If the job has been correctly done when a common stock is purchased, the time to sell it is—almost never.

The more you're actively and practically engaged, the more successful you will feel.

Fear can hold you prisoner, hope can set you free.

生活中最重要的事情是做你自己。除非你能成为蝙蝠侠，那就永远做蝙蝠侠。

数学家的工作大多是孤独的追求，但它建立在许多其他人的工作之上。