The office of the Kohathites is of peculiar sanctity, next to that of Aaron and his sons. They are not "cut off" or specially separated from among the Levites (iv. 18); but they have duties that require great care, and they must not venture to approach the most holy things till preparation has been made by the priests. The manner of that preparation is fully described. When order has been given for the setting forward of the camp, Aaron and his sons cover the ark of the covenant first with the veil of the screen, then with a covering of sealskin, and lastly with a cloth of blue; they also insert in the rings the long staves with which the ark is to be carried. Next the table of shewbread is covered with a blue cloth; the dishes, spoons, bowls, and cups are placed on the top, over them a scarlet cloth, and above that a sealskin covering; the staves of the table are also placed in readiness. The candlestick and its lamps and other appurtenances are wrapped up in like manner and put on a frame. Then the golden altar by itself, and the vessels used in the service of the sanctuary by themselves are covered with blue cloth and sealskin and made ready for carriage. Finally, the great altar is cleansed of ashes, covered up with purple cloth and sealskin, and its staves set in their rings. When all this is done the sons of Kohath may advance to bear the holy things, never touching them lest they die. The question arises, why so great care is considered necessary that none but the priests should handle the furniture of the sanctuary. We have learned to think that a real religion should avoid secrecy, that everything connected with it should be done in the open light of day. Why, then, is the shrine of Jehovah guarded with such elaborate precaution? And the answer is that the idea of mystery appears here as absolutely needful, in order to maintain the solemn feelings of the people and their sense of the holiness of God. Not only because the Israelites were rude and earthly, but also because the whole system was symbolic, the holy things were kept from common sight. In this respect the worship described in these books of Moses resembled that of other nations of antiquity. The Egyptian temple had its innermost shrine where the arks of the gods were placed; and into that most holy place with its silver soil the priests alone went. But even Egyptian worship, with all its mystery, did not always conceal the arks and statues of the gods. When those gods were believed to be favourable, the arks were carried in procession, the images so far unveiled that they could be seen by the people. It was entirely different in the case of the sacred symbols and instruments of Hebrew worship, according to the ideal of the law. And the elaborate precautions are to be regarded as indicating the highest tide-mark of symbolised sanctity. Jehovah was not like Egyptian or Assyrian or Phœnician gods. These might be represented by statues which the people could see.