In fact,by age eighty-five, people are happier with their life than when they are eighteen years old.

VOA: special.2010.08.03

Positive psychology, studying it, applying the ideas to my life has made me significantly happier.

研究积极心理学，把其理念应用到生活中，让我无比快乐。

哈佛公开课 - 幸福课课程节选