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.

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

In Luke 14:28, this signifies to determine how one may procure for oneself interior truths. (Arcana Coelestia 4599[5])

In Revelation 18:19, this signifies the belief that for certain temporary actions people could receive spiritual blessings and rewards after death. (Apocalypse Revealed 789)