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.

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

2728. Now because few at the present day know what genuine conjugial love is, as has been stated, that love will now be described from things that have been disclosed to me. Conjugial love has its origin in the marriage of Divine Good and Truth, and so in the Lord Himself. But the derivation of conjugial love from that marriage cannot be seen by man, neither by sensory perception nor by mental apprehending; but it may nevertheless become clear to him from influx and from correspondence, as well as from the Word. It may become clear from influx, in that from the union of good and truth which flow in from the Lord, heaven is compared to a marriage, and is called a marriage; from correspondence, in that when good united to truth flows down into a lower sphere it presents itself as a union of minds, and when it flows down into a lower sphere still it presents itself as a marriage. Consequently the union of minds springing from good united to truth from the Lord is conjugial love itself.