Selection from Arcana Coelestia ~ Emanuel Swedenborg
As the Word is from the Lord, and descends from Him through heaven to man, it is therefore such that it is Divine as to every particular; and as it has descended from the Lord, so it ascends, that is, is uplifted to Him, and this through the heavens. It is known that there are three heavens, and that the inmost heaven is called the third heaven, the middle heaven the second heaven, and the lowest the first heaven; and therefore when the Word ascends as it descends, in the Lord it is Divine; in the third heaven it is celestial (for this heaven is the celestial heaven); in the second heaven it is spiritual (for this heaven is the spiritual heaven); and in the first heaven it is celestial and spiritual natural, and the same heaven is also so termed. But in the church with man, the Word as regards the sense of its letter is natural, that is, worldly and earthly.
From this it is manifest what the nature of the Word is, and how the case is with the Word when it is being read by a man who is in what is holy, that is, in good and truth. For it then appears to him as worldly, or as historical, within which there is nevertheless what is holy.
• In the first heaven it appears as celestial and spiritual natural, within which there is nevertheless what is Divine;
• In the second heaven it is spiritual
• In the third heaven it is celestial
and
• In the Lord it is Divine.
The sense of the Word is circumstanced in accordance with the heavens
• The supreme sense of the Word, in which the subject treated of is the Lord, is for the inmost or third heaven;
• Its internal sense, in which the subject treated of is the Lord's kingdom, is for the middle or second heaven;
• The lower sense of the Word, in which the internal sense is determined to the nation that is named, is for the lowest or first heaven;
and
• The lowest or literal sense is for man while still living in the world, and who is nevertheless of such a nature that the interior sense, and even the internal and the supreme senses, can be communicated to him. For man has communication with the three heavens, because he is created after the image of the three heavens, even so that when he lives in love to the Lord and in charity toward the neighbor, he is a heaven in the least form. Hence it is that within man is the Lord's kingdom, as the Lord Himself teaches in Luke:
Behold, the kingdom of God is within you (Luke 17:21).
(from Arcana Coelestia 4279)