You know, one of the things that I say and only half ingest, is that I know of no more selfish act and a benevolent act.

我说到的一件事，只说了一半意思，即最自私的所为就是善举。

哈佛公开课 - 幸福课课程节选

That seems like a good thing to do.

这还真是一个善举啊

耶鲁公开课 - 博弈论课程节选