Arcana Coelestia # 2713
2713. That 'a wilderness' means that which is obscure in comparison is clear from the meaning of 'a wilderness' as that which is obscure, when it has reference to the spiritual man in comparison with the celestial man, dealt with above in 2708.
Isaiah 41:18-20
18
I will open rivers on the bare heights, and springs in the midst of the valleys. I will make the wilderness a pool of water, and the dry land springs of water.
19
I will put cedar, acacia, myrtle, and oil trees in the wilderness. I will set fir trees, pine, and box trees together in the desert;
20
that they may see, know, consider, and understand together, that the hand of Yahweh has done this, and the Holy One of Israel has created it.