Wilderness
'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.
(Odkazy: Arcana Coelestia 1927)
Knock
'Behold I stand at the door and knock,' as in Revelation 3:20, signifies the perpetual presence and workings of the Lord with man.
(Odkazy: Apocalypse Explained 248)