is today I'm happier than I was 15 years ago when I started focusing on this pursuit.

我今天是否比我15年前刚开始关注追求幸福时更幸福。

哈佛公开课 - 幸福课课程节选

If I'm happier, I'm more likely to contribute to other people's happiness and wellbeing.

如果我更快乐，我更有可能,对他人的快乐和幸福作出贡献。

哈佛公开课 - 幸福课课程节选