John Calvin Commentary Isaiah 35:7

"And the glowing sand shall become a pool, and the thirsty ground springs of water: in the habitation of jackals, where they lay, shall be grass with reeds and rushes." — Isaiah 35:7 (ASV)

The dry place shall be changed into a pool. He confirms the former statement, that Christ will come in order to enrich his people with all abundance of blessings; for waters will flow out of “dry places.” We must remember what we mentioned a little before, that the Prophet portrays for us what may be called a picture of a happy life. For although this change was not openly visible at the coming of Christ, yet the Prophet affirms with good reason that, during his reign, the whole earth will be fruitful; for he had previously said that without Christ all things are cursed to us.

In the habitation of dragons. The whole world, therefore, will resemble a parched wilderness, in which lions, “dragons,” and other wild beasts prowl, until the kingdom of Christ is established. On the other hand, when he is established on his throne, the godly will lack nothing. An instance of this was given when the Lord delivered his people and brought them out of Babylon; but the accomplishment of this prophecy must be looked for in Christ, through whom their ruinous condition is amended and restored, for that deliverance was only a feeble representation of it.

And yet the full accomplishment of this promise should not be expected in the present life. For as it is through hope that we are blessed (Romans 8:24), so our happiness, which is now in some respects concealed, must be an object of hope until the last day; and it is enough that some taste of it is enjoyed in this world, so that we may more ardently long for that perfect happiness.