'Wilderness' signifies something with little life in it, as described in the internal sense in Luke 1:80 'Wilderness' signifies somewhere there is no good because there is no truth. 'Wilderness,' as in Jeremiah 23:10, signifies the Word when it is adulterated.

(റഫറൻസുകൾ: Arcana Coelestia 1927)

722. 17:3 So he carried me away in the spirit into the wilderness. This symbolizes John's being carried away in a spiritual state to people in whom everything of the church had been destroyed.

A wilderness symbolizes a church in which there is no longer any truth, thus where everything in it has been destroyed (no. 546). And to be in the spirit means, symbolically, to be in a spiritual state as a result of Divine influx, as said in no. 36 above. Consequently, John's being carried away in the spirit into the wilderness means symbolically that he was carried away in a spiritual state to people in whom everything having to do with the church was destroyed.