《韩非子·说疑》
做君主的，假如真能洞察臣子的言论，那么即使打猎骑马，沉溺女乐，国家还是可保全的；不能洞察臣子的言论，即使节俭勤劳，布衣粗食，国家还是会灭亡。
为人主者，诚明于臣之所言，则虽弋驰骋，撞钟舞女，国犹且存也；不明臣之所言，虽节俭勤劳，布衣恶食，国犹自亡也。
As the king, if you can observe the minister's words and actions, the national security would still be protected even if you go hunting, indulge in playing with women. If you can't observe the minister's words and actions, the country would be ruined even if you are frugal and diligent, and if you eat coarse food and wear simple clothes.