The Book of Numbers, called also "In the wilderness," opens with the second month of the second year after the exodus, and goes on to the arrival of the tribes in the plains of Moab by the Jordan. As a whole it may be said to carry out the historical and religious ideas of Exodus and Leviticus: and both the history and the legislation flow into three main channels. They go to establish the separateness of Israel as a people, the separateness of the tribe of Levi and the priesthood, and the separateness and authority of Jehovah. The first of these objects is served by the accounts of the census, of the redemption of the first-born, the laws of national atonement and distinctive dress, and generally the Divine discipline of Israel recorded in the course of the book. The second line of purpose may be traced in the careful enumeration of the Levites; the minute allocation of duties connected with the tabernacle to the Gershonites, the Kohathites, and the Merarites; the special consecration of the Aaronic priesthood; the elaboration of ceremonials requiring priestly service; and various striking incidents, such as the judgment of Korah and his company, and the budding of Aaron's almond twig. Lastly, the institution of some cleansing rites, the sin offering of chap. xix. for example, the details of punishment that fell upon offenders against the law, the precautions enjoined with regard to the ark and the sanctuary, together with the multiplication of sacrifices, went to emphasise the sanctity of worship and the holiness of the unseen King. The book is sacerdotal; it is marked even more by a physical and moral Puritanism, exceedingly stringent at many points. The whole system of religious observance and priestly ministration set forth in the Mosaic books may seem difficult to account for, not indeed as a national development, but as a moral and religious gain. We are ready to ask how God could in any sense have been the author of a code of laws imposing so many intricate ceremonies, which required a whole tribe of Levites and priests to perform them. Where was the spiritual use that justified the system, as necessary, as wise, as Divine? Inquiries like these will arise in the minds of believing men, and sufficient answer must be sought for.