The most altruistic behavior of all, giving your life to help another, can be explained in cold-blooded evolutionary terms.

最利他的行为，就是为他人牺牲自己，这也可以用毫无人情味的进化论来解释。

耶鲁公开课 - 心理学导论课程节选

These are particularly callous and cold-blooded statements suggesting that this instinctive empathy, this aspect of moral thought, is not-- is present in most of us but not in all of us.

这些极其无情冷血的话,表明移情这种本能，这种道德观念的一个要素-,存在于我们大部分人当中，但不是所有人。

耶鲁公开课 - 心理学导论课程节选