信人之患
The Peril of Trusting Others
人主之患在於信人,信人,則制於人。人臣之於其君,非有骨肉之親也,縛於勢而不得不事也。故為人臣者,窺覘其君心也,無須臾之休,而人主怠傲處上,此世所以有劫君殺主也。為人主而大信其子,則奸臣得乘於子以成其私,故李兌傳趙王而餓主父。為人主而大信其妻,則奸臣得乘於妻以成其私,故優施傳麗姬殺申生而立奚齊。夫以妻之近與子之親而猶不可信,則其餘無可信者矣。
The peril of a ruler lies in trusting others. If he trusts others, he is controlled by them. The relationship between a minister and his lord is not one of blood kinship -- it is the constraint of political circumstance that compels service. Therefore ministers ceaselessly scrutinize their lord's mind, never resting for an instant, while the ruler sits above in idle arrogance. This is how rulers come to be coerced and sovereigns murdered.
If a ruler places great trust in his sons, treacherous ministers exploit the sons to advance their private interests. Thus Li Dui manipulated the King of Zhao and starved King Wuling to death. If a ruler places great trust in his wife, treacherous ministers exploit the wife to advance their private interests. Thus the actor Shi aided Lady Li Ji in murdering Crown Prince Shensheng and enthroning Xi Qi. If even a wife, who is closest, and a son, who is dearest, cannot be trusted, then nothing else can be trusted at all.
Notes
Minister of Zhao who conspired with Zhao Huiwen Wang. In 295 BC, he besieged King Wuling (主父, 'the Lord Father,' the abdicated king) in the Shaqiu Palace and starved him to death.
King Wuling of Zhao (趙武靈王, r. 325-299 BC), who abdicated in favor of his younger son but retained the title 'Lord Father' (主父). He was trapped and starved to death in the Shaqiu Incident of 295 BC.
A court entertainer (優, actor/jester) in the state of Jin during the reign of Duke Xian (r. 676-651 BC). He served as an intermediary for Lady Li Ji's plot.
Consort of Duke Xian of Jin. She schemed to replace Crown Prince Shensheng with her own son Xi Qi. Her machinations led to Shensheng's suicide in 656 BC.
Crown Prince of Jin, eldest son of Duke Xian. Falsely accused of attempted poisoning by Lady Li Ji, he chose suicide rather than fleeing, in 656 BC.
Son of Lady Li Ji and Duke Xian of Jin. He was briefly installed as heir but was murdered shortly after Duke Xian's death in 651 BC.
