And further, it may be said, the pillar of cloud and fire retains the whole of its value as a symbol when the intervention of Moses is admitted; and this may be proved by the analogy of other emblems. Almost parallel to the cloud, for instance, is the serpent of brass, which became a sign of Jehovah's healing power, and conveyed new life to those who looked towards it in faith. The fact that this rude image of a serpent was made by human hands did not in the least impair its value as an instrument of deliverance, and the efficacy of that particular symbol was selected by Christ as an illustration of His own redeeming energy which was to be gained through the cross: "As Moses lifted up the serpent in the wilderness, even so must the Son of man be lifted up." For certain occasions and needs of a people one symbol avails; in other circumstances there must be other signs. The smoke-cloud was not enough when the serpents terrified the host. Elijah in this same desert saw a flashing fire; but Jehovah was not in the fire. Natural symbols, however impressive, do not avail by themselves; and when God by His prophet says, "This cloud, this fire, symbolise My presence," and the people believe, is it not sufficient? The Divine Friend is assuredly there. The symbol is not God; it represents a fact, impresses a fact which altogether apart from the symbol would still hold good. In the course of the passage (ix. 17-23) the manner of the guidance given by means of the cloud is carefully detailed. Sometimes the tribes remained encamped for many days, sometimes only from evening to morning. "Whether it were two days, or a month, or a year, that the cloud tarried on the tabernacle, abiding thereon, the children of Israel remained encamped, and journeyed not: but when it was taken up, they journeyed." Here is emphasised the authority which lay in "the commandment of the Lord _by the hand of Moses_" (ver. 23). For Israel, as for every nation that is not lost in the desert of the centuries, and every society that is not on the way to confusion, there must be wise guidance and cordial submission thereto. We are not, however, saved now, as the Israelites were, by a great movement of society, or even of the Church. Individually we must see the signal of the Divine will, and march where it points the way. And in a sense there are no rests of many days. Each morning the cloud moves forward; each morning we must strike our tents. Our march is in the way of thought, of moral and spiritual progress; and if we live in any real sense, we shall press on along that way. The indication of duty, the guidance in thought which we are to follow, impose a Divine obligation none the less that they are communicated through the instrumentality of men. For every group of travellers, associated in worship, duty, and aim, there is some spiritual authority pointing the direction to be followed. As individuals we have our separate calling, our