And here's why. Because this is the No. 1-- equating to selfishness and immorality is the No. 1 cause-- subconsciously mostly, but not only-- No. 1 cause of unhappiness.

这就是为什么，因为这是头号-,将自私等同于不道德是头号原因-,多数是在潜意识里-,导致不快乐的头号原因。

哈佛公开课 - 幸福课课程节选

Well, in our culture, selfishness and immorality have essentially become synonymous.

在我们的文化中，自私和不道德成了同义词。

哈佛公开课 - 幸福课课程节选

Then, of course, the greatest form of immorality-- and think of it when you compare it with what was the form of immortality available to Achilles and his fellow heroes.

当然,最伟大的永生形式,当你将它和阿喀琉斯以及跟随他的英雄,获得永生的事迹进行一个比较

耶鲁公开课 - 古希腊历史简介课程节选