V. That they shall have seasonable and suitable supplies of every thing that is proper for them in the time of need; and, if there be occasion, God will again do for them as he did for Israel in their march from Egypt to Canaan, v. 17-19. When the captives, either in Babylon or in their return thence, are in distress for want of water or shelter, God will take care of them, and, one way or other, make their journey, even through a wilderness, comfortable to them. But doubtless this promise has more than such a private interpretation. Their return out of Babylon was typical of our redemption by Christ; and so the contents of these promises, 1. Were provided by the gospel of Christ. That glorious discovery of his love has given full assurance to all those who hear this joyful sound that God has provided inestimable comforts for them, sufficient for the supply of all their wants, the balancing of all their griefs, and the answering of all their prayers. 2. They are applied by the grace and Spirit of Christ to all believers, that they may have strong consolation in their way and a complete happiness in their end. Our way to heaven lies through the wilderness of this world. Now, (1.) It is here supposed that the people of God, in their passage through this world, are often in straits: The poor and needy seek water, and there is none; the poor in spirit hunger and thirst after righteousness. The soul of man, finding itself empty and necessitous, seeks for satisfaction somewhere, but soon despairs of finding it in the world, that has nothing in it to make it easy: creatures are broken cisterns, that can hold no water; so that their tongue fails for thirst, they are weary of seeking that satisfaction in the world which is not to be had in it. Their sorrow makes them thirsty; so does their toil. (2.) It is here promised that, one way or other, all their grievances shall be redressed and they shall be made easy. [1.] God himself will be nigh unto them in all that which they call upon him for. Let all the praying people of God take notice of this, and take comfort of it; he has said, "I the Lord will hear them, will answer them; I, the God of Israel, will not forsake them; I will be with them, as I have always been, in their distresses." While we are in the wilderness of this world this promise is to us what the pillar of cloud and fire was to Israel, an assurance of God's gracious presence. [2.] They shall have a constant supply of fresh water, as Israel had in the wilderness, even where one would least expect it (v. 18): I will open rivers in high places, rivers of grace, rivers of pleasure, rivers of living water, which he spoke of the Spirit (John vii. 38, 39), that Spirit which should be poured out upon the Gentiles, who had been as high places, dry and barren, and lifted up on their own conceit above the necessity of that gift. And there shall be fountains in the midst of the valleys, the valleys of Baca (Ps. lxxxiv. 6), that are sandy and wearisome; or among the Jews, who had been as fruitful valleys in comparison with the Gentile mountains. The preaching of the gospel to the world turned that wilderness into a pool of water, yielding fruit to the owner of it and relief to the travellers through it. [3.] They shall have a pleasant shade to screen them from the scorching heat of the sun, as Israel when they pitched at Elim, where they had not only wells of water, but palm-trees (Exod. xv. 27): "I will plant in the wilderness the cedar, v. 19. I will turn the wilderness into an orchard or garden, such as used to be planted with these pleasant trees, so that they shall pass through the wilderness with as much ease and delight as a man walks in his grove. These trees shall be to them what the pillar of cloud was to Israel in the wilderness, a shelter from the heat." Christ and his grace are so to believers, as the shadow of a great rock, ch. xxxii. 2. When God sets up his church in the Gentile wilderness there shall be as great a change made by it in men's characters as if thorns and briers were turned into cedars, and fir-trees, and myrtles; and by this a blessed change is described, ch. lv. 13. [4.] They shall see and acknowledge the hand of God, his power and his favour, in this, v. 20. God will do these strange and surprising things on purpose to awaken them to a conviction and consideration of his hand in all: That they may see this wonderful change, and knowing that it is above the ordinary course and power of nature may consider that therefore it comes from a superior power, and, comparing notes upon it, may understand together, and concur in the acknowledgment of it, that the hand of the Lord, that mighty hand of his which is stretched out for his people and stretched out to them, has done this, and the Holy One of Israel has created it, made it anew, made it out of nothing, made it for the comfort of his people. Note, God does great things for his people, that he may be taken notice of.