To study the mind is to study the strategies of survival.

The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.

最危险的世界观是那些未曾看过世界的人的世界观。

The people who are crazy enough to think they can change the world are the ones who do.

在一个国家中，一个公民的自由是对其他人的威胁。