《韩非子·说疑》
所以说：庶子中有和嫡子行事一样的人，配偶中有和正妻尊荣相等的妄，朝廷中有和国相权势相同的大臣，臣子中有和君主地位相似的宠臣，这四种情况，是使国家陷于危险的根源。
故曰：孽有拟适之子，配有拟妻之妾，廷有拟相之臣，臣有拟主之宠，此四者，国之所危也。
Therefore I say: In the category of his sons, there are those who behave like the main son, in a couple, there is the concubine who has the same honor as the main wife, in the imperial court, there are ministers with the same power as the prime minister, among officials, there are favorite ministers whose status is similar to that of the king, these four situations are the root cause that brings a country into danger.