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)

9644. 'Under the twenty boards' means which proceeds from the good that comes from the Lord's Divine Human. This is clear from the meaning of 'twenty' as that which is complete, thus in every respect and totally, dealt with above in 9641; and from the meaning of 'the boards of the dwelling-place' as the good lending support to heaven, dealt with in 9634. This good is the good of merit, and so belongs to the Lord's Divine Human, see 7850, 9127; and it is the one and only good that reigns in heaven, 9486. The fact that the truth meant by 'the bases' proceeds from this good is meant by the presence of the bases 'under the boards'.