Every mental state exists for a purpose; to understand it, we must ask what function it serves in the broader system of behavior.

Food security begins with empowering those who grow our food.

海洋是伟大的统一者，因为地球上所有生命都依赖于它的健康。

种一棵树最好的时间是二十年前，其次是现在。

人们有时为了得到自己想要的东西，会变得残酷。