"This is the same thing as in the Angel's Wing next to Cambodia sanctuary for the enemy, can't go across that line, can't get into that area where the enemy is.

VOA: standard.2009.09.09

Isn't the distinction between friend and enemy ? based on a kind of knowledge, on a perception of ? who is your friend and who is your enemy?

朋友与敌人之间的差别,不是根据知识吗，或是你对,谁是朋友或敌人的看法？

耶鲁公开课 - 政治哲学导论课程节选

To say giving bad news to an enemy is reinforcing because it makes the enemy feel bad doesn't say anything different from giving bad news to an enemy feels good because we like to give bad news to an enemy.

由于使敌人感到不快,而认定向敌人散布坏消息是强化行为,这与因为我们想要敌人听到坏消息,而向心情良好的敌人散布坏消息,没什么区别。

耶鲁公开课 - 心理学导论课程节选