This refers to prejudice a person has developed towards a particular person or thing. The concept is from Zhuangzi. The author Zhuangzi (369?-286 BC) believed that people will develop biased views about other people or things when they only look at other people or things from their own perspectives. Such bias caused by different points of view or standards can lead to disagreement or confrontation. People seldom realize that they have a biased mind. Thus Zhuangzi suggested that people need to be aware of their own biased mind and overcome it.

If people just follow their own biased mind, does it mean that there are no general standards for all to follow? Both those well-informed people who know that everything changes and foolish people have biased minds. Claiming to know about what is right and wrong about something before gaining enough knowledge about it is like journeying to the State of Yue today and arriving there yesterday. Zhuangzi