But everything used in His worship must be kept apart. The worship must be of faith; and the ark which was the great symbol must remain always invisible. The effect of this on the popular mind was complex, varying with the changing circumstances of the nation; and to trace it would be an interesting piece of study. It may be remembered that in the time of most ardent Judaism the want of the ark made no difference to the veneration in which the temple was held and the intense devotion of the people to their religion. The ark was used as a talisman in Eli's time; in the temple erected after the captivity there was no ark; its place in the holy of holies was occupied by a stone. The Gershonites had as their charge the screens and curtains of the tabernacle, or most holy place, and the tent of meeting or holy place, also the curtains of the court of the tabernacle. The boards, bars, pillars, and sockets of the tabernacle and of the court were to be entrusted to the Merarites. In the whole careful ordering of the duties to be discharged by these Levites we see a figure of the service to be rendered to God and men in one aspect of it. Organisation, attention to details, and subordination of those who carry out schemes to the appointed officials, and of all, both inferior and superior, to law--these ideas are here fully represented. Assuming the incapacity of many for spontaneous effort, the principle that God is not a God of confusion but of order in the churches of the saints may be held to point to subordination of a similar kind even under Christianity. But the idea carried to its full limit, implies an inequality between men which the free spirit of Christianity will not admit. It is an honour for men to be connected with any spiritual enterprise, even as bearers of burdens. Those who take such a place may be spiritual men, thoughtful men, as intelligent and earnest as their official superiors. But the Levites, according to the law, were to be bearers of burdens, menials of the sanctuary from generation to generation. Here the parallel absolutely fails. No Christian, however cordially he may fill such a place for a time, is bound to it in perpetuity. His way is open to the highest duties and honours of a redeemed son of God. In a sense Judaism even did not prevent the spiritual advancement of any Levite, or any man. The priesthood was practically closed, but the office of the prophet, really higher than that of the priest, was not. From the routine work of the priesthood men like Jeremiah and Ezekiel were called by the Spirit of God to speak in the name of the Highest. The word of the Lord was put into their mouths. Elijah, who was apparently of the tribe of Manasseh, Amos and Daniel, who belonged to Judah, became prophets. The open door for the men of the tribes was into this calling. Neither in Israel nor in Christendom is priesthood the highest religious function. The great servants of God might well refuse it or throw aside its shackles.