The first honour conferred on Levi in connection with religious service was the appointment of Aaron and his sons to the special service of the priesthood (Exod. xxviii.; Numb. xviii. 1). This did not necessarily involve any spiritual distinction for the whole tribe of which Aaron was a member, nor was that distinction conferred at that time. It was after the affair of the golden calf that the tribe of Levi received this honour. For when Moses, in his holy zeal against that scandal, called upon all who were on the Lord's side to come to him, "all the sons of Levi gathered themselves unto him" (Exod. xxxii. 26). This seems to imply that that tribe alone held itself aloof from the atrocious idolatry into which even Aaron had been drawn. And apparently it was in connection with this high act of service that Levi was selected as the sacred tribe, and in due time formally substituted for the firstborn in every family (Numb. iii. 12, _sqq._, viii. 6 _sqq._, xviii. 2 _sqq._). From this time the tribe of Levi stood to God in a relation of peculiar honour and sacredness, and had duties assigned to them in harmony with this eminent position. The tribe of Levi consisted of three main branches, corresponding to Levi's three sons--Kohath, Gershon, and Merari. The Kohathites, though apparently not the oldest (see Numb. iii. 17) were the most distinguished, Moses and Aaron being of that branch. As Levites, the Kohathites had charge of the ark and its sacred furniture, guarding it at all times, and carrying it from place to place during the journeys of the wilderness. The Gershonites had charge of the tabernacle, with its cords, curtains, and coverings. The sons of Merari had charge of the more solid parts of the tabernacle, "its boards and bars, its pillars and its pins, and all the vessels thereof." Korah, the leader of the rebellion against Moses and Aaron, was, like them, of the family of Kohath, and the object of his rebellion was to punish what he considered the presumption of the two brothers in giving to Aaron the special honours of a priesthood which, in former days, had belonged alike to all the congregation (Numb. xvi. 3). We are accustomed to think that the supernatural proofs of the Divine commission to Moses were so overwhelming that it would have been out of the question for any man to challenge them. But many things show that, though we might have thought opposition to Moses impossible, it prevailed to a great extent. The making of the golden calf, the report of the spies and the commotion that followed, the rebellion of Korah, and many other things, prove that the prevalent spirit was usually that of unbelief and rebellion, and that it was only after many signal miracles and signal judgments that Moses was enabled at last to exercise an unchallenged authority. The rationalist idea, that it was enthusiasm for Moses that led the people to follow him out of Egypt, and endure all the hardships of the wilderness, and that there is