If you are happy, and work on your happiness, you are contributing indirectly to other people's happiness, just like the baby who laughed last time-- made you laugh.

你快乐并努力争取快乐，就是间直接对他人的快乐作出贡献，就像上次大笑的婴儿，把你们逗笑。

哈佛公开课 - 幸福课课程节选

if you are doing something that you hate and you are not happy, why bother?

如果你做自己讨厌的事情，就会不高兴，何必呢？

怡人的的汉普斯特德 - SpeakingMax英语口语达人

And he asked them, "How happy are you going to be, ?" if you get the tenure?"

他问他们“你会多快乐，如果你得到终身职位“

哈佛公开课 - 幸福课课程节选

Welles presented it. He'll say no. It's a work of art. I find it exhilarating. So if you are an artist, you can always have an happy life dedicating yourself to your art.

威尔斯这般表达，他将对之说不,这只是个艺术活，我觉得它令人愉快,因此如果你是个艺术家，你就总能拥有,快乐的生活，全身心地投入到艺术中去。

麻省理工公开课 - 电影哲学课程节选