Arcana Coelestia #12
12. The sixth state is when he utters truths and performs good deeds from faith and consequently from love. What he brings forth at this point are called a living creature and a beast. And because at this point he starts to act from faith and also simultaneously from love, he becomes a spiritual man, who is called an image. The spiritual life of that man finds its delight in, and is sustained by, the things which are associated with cognitions of faith and with charitable acts, which are called his food; and his natural life finds its delight in, and is sustained by, those which belong to the body and the senses. The latter give rise to conflict until love rules and he becomes a celestial man.
Four
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)