THE DESERT SHALL REJOICE.
This, too, was fulfilled, was clearly fulfilled, by our Savior’s miraculous works after John’s preaching. Notice therefore how he bears good tidings to the desert, not generally or to any desert but to one particular desert by the bank of the Jordan. This was because John lived there and baptized there, as Scripture says, John was in the desert baptizing.[1] . . . I think the desert here is a symbol of that which of old was void of all God’s good things, I mean the church of the Gentiles. And the river by the desert that cleanses all that are bathed therein is a figure of some cleansing spiritual power, of which the Scriptures speak, saying, The movements of the river make glad the city of God.[2] And this means the ever-flowing stream of the Holy Spirit welling from above and watering the city of God, which is the name for life according to God. This river of God, then, has reached even to the desert, that is the Gentile church, and even now supplies it with the living water that it bears.
Proof of the Gospel 9.6