One of the expressions used by Paul in describing the sustenance of the Israelites has given rise to some discussion. "They did all drink," he says, "the same spiritual drink, for they drank of that spiritual Rock that followed them; and that Rock was Christ." Now there happened to be a Jewish tradition which gave out that the rock smitten by Moses was a detached block or boulder, "globular, like a beehive," which rolled after the camp in its line of march, and was always at hand, with its unfailing water-supply. This is altogether too grotesque an idea. The fact is that the Israelites did not die of thirst in the wilderness. It was quite likely they should; and but for the providential supply of water, so large a company could not have been sustained. And no doubt not only in the rock at Rephidim at the beginning of their journey and the rock of Kadesh at its close, but in many most unlikely places during the intervening years, water was found. So that in looking back on the entire journey it might very naturally be said that the rock had followed them, not meaning that wherever they went they had the same source to draw from, but that throughout their journeyings they were supplied with water in places and ways as unexpected and unlikely. Paul's point is that in the wilderness the food and drink of the Israelites were "spiritual," or, as we should more naturally say, sacramental; that is to say, their sustenance continually spoke to them of God's nearness and reminded them that they were His people. And as Christ Himself, when He lifted the bread at the Last Supper, said, "This is My body," so does Paul use analogous language and say, "That Rock was Christ," an expression which gives us considerable insight into the significance of the Israelitish types of Christ, and helps to rid our minds of some erroneous impressions we are apt to cherish regarding them. The manna and the water from the rock were given to sustain the Israelites and carry them towards their promised land, but they were so given as to quicken faith in God. To every Israelite his daily nourishment might reasonably be called spiritual, because it reminded him that God was with him in the wilderness, and prompted him to think of that purpose and destiny for the sake of which God was sustaining the people. To the devout among them their daily food became a means of grace, deepening their faith in the unseen God and rooting their life in a true dependence upon Him. The manna and the water from the rock were sacramental, because they were continuous signs and seals of God's favour and redeeming efficiency and promise. They were types of Christ, serving for Israel in the wilderness the purpose which Christ serves for us, enabling them to believe in a heavenly Father who cared for them and accomplishing the same spiritual union with the unseen God which Christ accomplishes for us.