The number "four" in the Bible represents things being linked together or joined. This is partly because four is two times two, and two represents the ultimate linking between our desire to be good and our understanding of truth. We can also see this in the fact that most buildings are rectangular, with the four sides linking together to make a whole. We also divide directions into four -- north, east, south and west -- and talk about the "four corners" of something meaning all of it. So our special thinking naturally looks at four sides as linking together into a whole.

(Verweise: Apocalypse Explained 417; Arcana Coelestia 1686, 9103, 9601, 9767, 9864)

1687. Verse 10 And the valley of Siddim was pits after pits of bitumen; and the king of Sodom and [the king] of Gomorrah fled, and they fell there; and the rest fled to the mountain.

'The valley of Siddim was pits after pits of bitumen' means the uncleanness of falsities and evil desires. 'And the king of Sodom and [the king] of Gomorrah fled, and they fell there' means that those evils and falsities were overcome. 'And the rest fled to the mountain' means that it did not happen to all of them, 'a mountain' meaning self-love and love of the world.