The tribe of Levi is, according to ver. 6 ff., appointed to minister to Aaron, and to keep his charge and that of the congregation before the "tent of meeting," to do the service of the tabernacle. For all the necessary work connected with the sanctuary the Levites are "wholly given unto Aaron on behalf of the children of Israel." It was of course in accordance with the patriarchal idea that each clan should have a hereditary chief. Here, however, an arbitrary rule breaks in. For Aaron was not by primogeniture head of the tribe of Levi. He belonged to a younger family of the tribe. The arrangements made by Moses as the representative of God superseded the succession by birthright. And this is by no means the only case in which a law usually adhered to was broken through. According to the history the high-priesthood did not invariably follow the line of Eleazar. At a certain point a descendant of Ithamar was for some reason raised to the dignity. Samuel, too, became virtually a priest, and rose higher than any high-priest before the captivity, although he was not even of the tribe of Levi. The law of spiritual endowment in his case set the other aside. And is it not often so? The course of providence brings forward the man who can guide affairs. While his work lasts he is practically supreme. It is useless to question or rebel. Neither in religion nor in government can the appeal to Divine right or to constitutional order alter the fact. Korah need not revolt against Moses; nor may Aaron imagine that he can push himself into the front. And Aaron, as head of the tribe of Levi, and of the religious administration, is safe in his own position so long only as his office is well served. It is to responsibility he is called, rather than to honour. Let him do his duty, otherwise he will surely become merely a name or a figure. 2. THE FIRST-BORN NUMBERS iii. 11-13, 40-51 These two passages supplement each other and may be taken together. Jehovah claims the first-born in Israel. He hallowed them unto Himself on the day when He smote all the first-born in the land of Egypt. They are now numbered from a month old and upward. But instead of their being appointed personally to holy service, the Levites are substituted for them. The whole account supplies a scheme of the origin of the sacerdotal tribe.