《贞观政要·卷三·君臣鉴戒》
为臣听说国君就像是一个人的脑袋，大臣就像是一个人的四肢，只有同心协力地配合起来，才能构成一个人的整体。缺少任何一部分，都不能算是一个完整的人。
臣闻君为元首，臣作股肱，齐契同心，合而成体，体或不备，未有成人。
As your subject heard it, the ruler is like the head of a human body, while ministers are the body's limbs. Only through concerted efforts can they form a whole person. Without any part, it's not a whole person.