In Exodus 20:25, this signifies truths formed from good, or good in form, to signifies that nothing of self-intelligence should be involved in its forming. (Apocalypse Explained 391[21, 21])

Cities of the mountain and cities of the plain (Jeremiah 33:13) signify doctrines of charity and faith.

(Референце: Arcana Coelestia 2418)