To maintain one's integrity and uprightness even when unobserved; to be scrupulously honest in private.
他一向暗室不欺，无论有没有人在场，都坚持做正确的事情。
He has always been scrupulously honest, adhering to ethical conduct even when unobserved.
Era:
Ancient
Frequency:
Synonym:
Story:
During the Spring and Autumn period, Qu Boyu, a virtuous minister of the State of Wey, consistently observed court etiquette. When passing by Duke Ling of Wey's palace at night, he would dismount from his carriage and walk, as prescribed by court regulations. He never failed to adhere to palace etiquette just because it was nighttime and no one was watching.
Duke Ling of Wey highly valued him for this, often praising him in court for his 'dark room, no deception' integrity.
Next Idiom