Cities
Cities of the mountain and cities of the plain (Jeremiah 33:13) signify doctrines of charity and faith.
(References: Arcana Coelestia 2418)
Hebrews 12:1
1
Therefore let us also, seeing we are surrounded by so great a cloud of witnesses, lay aside every weight and the sin which so easily entangles us, and let us run with patience the race that is set before us,