If you make three people-- or even better, four people a day feel good and they make-- they pay it forward and make four others feel good, and so on and so on.

如果你能让三个人-,甚至四个人度过美妙的一天-,他们会推展，让四人有美好的一天，以此类推。

哈佛公开课 - 幸福课课程节选