6 But where thirsts our soul, and our flesh manifoldly, not for any one but for You, O Lord, that is our God? It thirsts where? “In a land desert, and without way, and without water.” Of this world we have spoken, the same is Idumæa, this is the desert of Idumæa, whence the Psalm has received its title. “In a land desert.” Too little it is to say “desert,” where no man dwells; it is besides, both “without way, and without water.” O that the same desert had even a way: O that into this a man running, even knew where he might thence get forth!...Evil is the desert, horrible, and to be feared: and nevertheless God has pitied us, and has made for us a way in the desert, Himself our Lord Jesus Christ: and has made for us a consolation in the desert, in sending to us preachers of His Word: and has given to us water in the desert, by fulfilling with the Holy Spirit His preachers, in order that there might be created in them a well of water springing up unto life everlasting. And, lo! We have here all things, but they are not of the desert....
Source: The Enarrations, or Expositions, on the Psalms (New Advent)