《贞观政要·卷一·论政体》
至于起耳目手足作用的，就寄托于你们了，既然君臣是一个整体，就理当协力同心，发现事情做得不稳妥的，要尽量把意见讲出来，不要有什么保留。
然耳目股肱，寄于卿辈，既义均一体。宜协力同心，事有不安，可极言无隐。
As for what to do with the ears, eyes, hands, and feet, I entrust it to you. Since the monarch and his subjects are one entity, they should naturally work together with one heart and one mind. If they find that something is not done properly, they should express their opinions as much as possible, without any reservations.