What a picture is painted in these verses! The dreary wilderness stretches before us, monotonous, treeless, in some parts bearing a scanty vegetation which flourishes in early spring and dies before fierce summer heats, but for the most part utterly desolate, the sand blinding the eyes, the ground cracked and gaping as if athirst for the rain that will not fall; over it the tantalising mirage dancing in mockery, and amid the hot sand the yelp of the jackals. What does this dead land want? One thing alone--water. Could that be poured upon it, all would be changed; nothing else will do any good. And it comes. Suddenly it bursts from the sand, and streams bring life along the desert. It gathers into placid lakes, with their whispering reeds and nodding rushes, and the thick cool grass round their margins. The foul beasts that wandered through dry places seeking rest are drowned out. So full of blessed change will be the coming of the Lord, of which all this context speaks. Mark that this burst of waters is when 'the Lord shall come,' and that it is the reason for the restoration of lost powers in men, and especially for a chorus of praise from dumb lips. This, then, is the central blessing. It is not merely a joyful transformation, but it is the reason for a yet more joyful transformation (chap. xliv. 3). Recall Christ's words to the Samaritan woman and in the Temple on the great day of the Feast. Then this is pre-eminently a description of the work of Christ. I. Christ brings the Supernatural Communication of a New Life. We may fairly regard this metaphor as setting forth the very deepest characteristic of the gospel. Consider man's need, as typified in the image of the desert. Mark that the supply for that need must come from without; that coming from without, it must be lodged in the heart of the race; that the supernatural communication of a new life and power is the very essence of the work of Christ; that such a communication is the only thing adequate to produce these wondrous effects. II. This new life slakes men's thirst. The pangs and tortures of the waterless wilderness. The thirst of human souls; they long, whether they know it or not, for-- Truth for Understanding. Love for Heart. Basis and Guidance for Will and Effort. Cleansing for Conscience. Adequate objects for their powers. They need that all these should be in One. The gnawing pain of our thirst is not a myth; it is the secret of man's restlessness. We are ever on the march, not only because change is the law of the world, nor only because effort and progress are the law for civilised men, but because, like caravans in the desert, we have to search for water. In Christ it is slaked; all is found there. III. The Communication of this New Life turns Illusions into Realities.