"The true prison is not made of walls, but of silenced tongues and censored thoughts."

For every expert there is an equal and opposite expert, but for every fact there is not necessarily an equal and opposite fact.

The cognitive map is not a picture or a model in the head, but a dynamic, changing representation of the environment.

A mathematician is a device for turning coffee into theorems.

创新是看到每个人都看到的东西，思考没有人想过的事情。

大国政治的悲剧在于，即使是善意的国家也被迫采取可能导致冲突和战争的行为。

The absence of a strong state is a greater threat to liberty than its presence.

The writer must believe that what he is doing is the most important thing in the world. And he must hold to this illusion even when he knows it is not true.

自由不是恩赐，而是必须争取的权利。

公司的文化由领导者愿意容忍的最坏行为定义。