The veriest life of the angels is from heat, and from light only so far as heat is in it.  That life is from heat is shown by the fact that when heat is taken away life perishes.  The same is true of faith without love or of truth without good; since the truth that is called truth of faith is light, and the good that is called good of love is heat. {1} This is more clearly shown by the heat and light of the world, to which the heat and light of heaven correspond.  By the world’s heat when conjoined with light, as in spring and summer, all things on the earth are quickened and grow, but by light separate from heat nothing is quickened or grows, but everything lies torpid and dies.  They are not conjoined in winter, when heat is absent though light remains.  From this correspondence heaven is called paradise, since truth is there joined with good, or faith with love, as light is with heat in springtime on the earth.  All this makes more clear the truth set forth in its own chapter (n. 13-19), that the Divine of the Lord in Heaven is love to Him and charity towards the neighbor.

{Footnote 1} Truths apart from good are not in themselves truths because they have no life; for truths have all their life from good (n. 9603).  Thus truths apart from good are like a body without a soul (n. 3180, 9154).  Truths apart from good are not accepted by the Lord (n. 4368).  What truth apart from good, that is, what faith apart from love is, and what truth from good or faith from love is (n. 1949-1951, 1964, 5830, 5951).  It amounts to the same thing whether you say truth or faith, or whether you say good or love, since truth is of faith and good is of love (n. 2839, 4352, 4353, 4997, 7178, 7623, 7624, 10367).

137.  It is said in John: 

In the beginning was the Word, and the Word was with God, and God was the Word.  All things were made through Him, and without Him was not any thing made that hath been made.  In Him was life, and the life was the light of men.  He was in the world, and the world was made through Him.  And the Word became flesh and dwelt among us, and we beheld His glory (1:1-14).

Evidently the Lord is here meant by “the Word,” for it is said that “the Word became flesh.”  But what is specifically meant by “the Word” is not known and shall therefore be explained.  Here “the Word” means the Divine truth which is in the Lord and from the Lord;{1} and this is why it is also called “the Light,” which is the Divine truth, as has been already shown in this chapter.  That it was by means of Divine truth that all things were created and made shall now be explained. [2] In heaven Divine truth has all power, and apart from it there is no power whatever.{2} From the Divine truth angels are called powers, and are powers to the extent that they are recipients or receptacles of it.  By means of it they prevail over the hells and over all that oppose them.  A thousand enemies there cannot stand against a single ray of the light