出自汉·桓宽《盐铁论·刺赋》。释义：冰和炭不能放在同一个容器之中，太阳和月亮也不会同时照耀大地。比喻君子与小人不能同处，或比喻相互矛盾的理论不能同时运用。

最好的领导者是那些先倾听、学习，然后再领导的人。

The mass media are anti-mediatory and intransitive. They fabricate non-communication—this is what characterizes them, if one agrees to define communication as an exchange, as a reciprocal space of a speech and a response, and thus of a responsibility.