9530. 'And a cubit its breadth' means somewhat so far as the joining to truth is concerned. This is clear from the meaning of 'a cubit' or one, as somewhat, since it is a half of the previous number, and when a double means all, the half of it means somewhat, and therefore somewhat so far as the joining together is concerned; and from the meaning of 'breadth' as truth, dealt with in 9487, 9488.

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)