Why does an act of consent make such a moral difference, that an act that would be wrong taking a life without consent, is morally permissible with consent?

为什么征得了同意，就能在道德上如此不同呢，没有征得同意就杀人，在道德上是不允许的，征得同意就是允许的吗？

耶鲁公开课 - 公正课程节选

We get used to the ticking of a clock or to noise of traffic but it's actually a very important form of learning because imagine life without it.

我们习惯了钟的滴答声和车来人往的噪音,但这却是一种非常重要的学习形式,我们不妨试想一下无法进行习惯化的情形。

耶鲁公开课 - 心理学导论课程节选

It was possible to imagine life without a king.

其民众却还能够设想一个没有君主的社会

耶鲁公开课 - 欧洲文明课程节选

But on the other hand these advances have also come at a cost. And in this story there's also a sense of longing for the freedom of life in the wild--the innocent, simple, uncomplicated life lived day to day without plans, without toil, in harmony with nature Edenic a somewhat Edenic existence.

但是，换个角度来看，人类付出了代价,才得到这些优点，在这部史诗中，同样存在着,对一种纯真，简单，纯粹生活的向往,每天生活中没有计划，辛劳，与自然和平相处,就像以前的。

耶鲁公开课 - 旧约导论课程节选