Even more truly indispensable than Tabernacle or Temple, in the maintenance of close relationship with Deity, is the Priesthood. It was therefore to be expected that with the establishment of a holy sanctuary, appointments and ordinations should be made whereby men would be truly set apart to the sacred offices of the Priesthood. While Moses was the great high priest of Israel, standing at the head of a distinctive dispensation of Divine authority and power, there were many priestly functions pertaining to the less exalted orders, and unto these Aaron and his four sons, Nadab, Abihu, Eleazer, and Ithamar, were set apart. As the Tabernacle had been built under express direction extending even into minute detail, so the ministrations of the Priesthood were prescribed and the order of worship was established, whereby the people should be reminded that amongst them dwelt {28} Jehovah, before whom they should set none other gods.[14] The Tabernacle was prepared primarily for migratory service; its parts therefore were separately finished and so fitted as to permit of easy putting together or taking apart. When set up within its court, the Tabernacle occupied the place of honor in the center of the camp. On the east, and therefore immediately before the entrance to the court, were the tents of the Priests; while on the other three sides the Levites were encamped. These, being closest in attendance have been likened to the body-guard of the Great King[15] whose throne was within the sanctuary; and beyond them were stationed the other tribes in order of established precedence. While dismantled and in transit, when the people were on the march, the Tabernacle still held the central place; its bearers were the Levites, and the whole army of Israel was its guard.