心理过程是在生存斗争中的手段。

事实上，自然科学长期以来只是大脑和想象力的产物：现在是时候回归到对物质和显而易见事物的朴素而健全的观察上了。

Small changes in incentives can lead to large changes in behavior.

The proletariat is the universal class, the class whose radical chains are capable of bursting asunder.

I've learned that you have to be strong enough to stand alone, smart enough to know when you need help, and brave enough to ask for it.