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

Which of the various futures that are open to me are likely to give me the better life, leave me better off, measured in terms of pleasure or pain?

也就是向我敞开的各种未来,哪种能给我更好的生活，让我更幸福，用快乐和痛苦来衡量？

耶鲁公开课 - 死亡课程节选