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.

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

9673. 'With cherubs' means watchfulness, guarding against the intermingling of the two - of spiritual good and celestial good, and so of the middle heaven and the inmost heaven. This is clear from the meaning of 'cherubs' as watchfulness and providence, guarding against access to the Lord except through good and guarding against any harm being done to the good from the Lord which is present in heaven and with a person, dealt with in 9509. The reason why guarding against the intermingling of spiritual good and celestial good, and so of those two heavens, is also meant is that if they did become intermingled they would both suffer harm, harm so serious that those actual heavens would be destroyed, as may be recognized from the difference between the two kinds of good, and so between the two heavens, spoken about in the places referred to above in 9670. For this reason there are intermediate angelic communities, among whom celestial-spiritual good exists and spiritual-celestial good; and through these communities the two heavens are linked together, 9670, 9671. Even with these communities the two forms of good have not been joined together, but exist distinct and separate from each other. From all this it is evident that those communities are guards, protecting both kinds of good from becoming intermingled, and therefore also that this watchfulness and providence which are the Lord's are meant by 'cherubs'.