Your past does not define your future.

All behavior is ultimately reducible to physical and chemical processes.

理解人类认知的关键在于理解符号是如何被操作的。

Spend each day trying to be a little wiser than you were when you woke up.

现在不是去想缺少什么的时候，该想一想凭现有的东西你能做什么。