每种心理状态都有其存在的目的；要理解它，我们必须询问它在更广泛的行为系统中发挥什么功能。

我不是为了纪录而打球。我打网球是因为我爱它。

Positive psychology is not just about feeling good, it's about the good life.

幸福是拥抱一个人的时候你知道你在拥抱整个世界。 《雪》

Sustainability isn't an option; it's a necessity for survival.

The most important questions of life are, for the most part, really only problems of probability.