How can I talk about or act in my life, ? pursuing my happiness isn't that selfish?

我谈论经营自己的生活，追求自己的快乐，这怎么不是自私？

哈佛公开课 - 幸福课课程节选

How can I pursue my happiness ? when there is so much suffering in the world?

我怎么能追求自己的快乐,当世上有那么多痛苦时？

哈佛公开课 - 幸福课课程节选