预测未来的最好方法就是去创造它。

史记

The deepest theorems often arise from the simplest observations.

人们不会使用手持计算器来学习计算，但是却会忘记算术。

The secondary rules are those that provide for the creation, alteration, and extinction of primary rules.

解释：死亡、生存、惊恐、惧怕等观念都进入不到他的内心中，因而遇到任何事情都不害怕。