"Courage is not the absence of fear, but the triumph over it."

作家是被激发模仿欲望的读者。

The future is not a result of choices among alternative paths offered by the present, but a place that is created—created first in the mind and will, created next in activity.

停在港口的船是安全的，但那不是造船的目的。

一个物理符号系统具备一般智能行为的必要和充分条件。

真正的监狱不是由围墙构成，而是由沉默的舌头和被审查的思想构成。