What is more important is that since this head is the object of the original declarative sentence, it represents the person or the thing affected, even if the head is abbreviated. In the feudal society with hierarchy classes, women called their husbands “heaven”, so as children to parents, ministers to emperors. To be extended from “by…”, it got the meaning of “reason”. However, without a thorough and careful analysis, we might make a mistake and interpret it as follows: When you know a thing, to recognize that you know it; and when you do not know a thing, to recognize that you don't know it; that is to know. A refreshing breeze on the river and the bright moon over the hills are immeasurable treasures our creator can take. These are words of the lower class. I am the father of the woman you married off. Come here and wage a life-and-death battle!