95. That heaven is divided into two kingdoms, one called the celestial kingdom and the other the spiritual kingdom, may be seen above in its own chapter. The celestial kingdom corresponds in general to the heart and all things of the heart in the whole body, and the spiritual kingdom to the lungs and to all things of the lungs in the whole body. Likewise in man heart and lungs form two kingdoms, the heart ruling there through the arteries and veins, and the lungs through the tendinous and motor fibers, both together in every exertion and movement. So in every man, in his spiritual world, which is called his spiritual man, there are two kingdoms, one of the will and the other of the understanding, the will ruling through affections for good, and the understanding through affections for truth; and these kingdoms correspond to the kingdoms of the heart and of the lungs in the body. It is the same in the heavens; the celestial kingdom is the voluntary part of heaven, and in it good of love reigns; the spiritual kingdom is the intellectual part of heaven, and in it truth reigns. These are what correspond to the functions of the heart and lungs in man. It is on account of this correspondence that in the Word the "heart" signifies the will and also good of love, and the "breath" of the lungs signifies the understanding and the truth of faith. For the same reason affections are ascribed to the heart, although they are neither in it nor from it.#
# The correspondence of the heart and lungs with the Greatest Man, which is heaven, from experience (n. 3883-3896),
The heart corresponds to those in the celestial kingdom, and the lungs to those in the spiritual kingdom (n. 3885-3887).
There is in heaven a pulse like that of the heart, and a respiration like that of the lungs but interior (n. 3884, 3885, 3887).
There the pulse of the heart varies in conformity to states of love, and the respiration in conformity to states of charity and faith (n. 3886, 3887, 3889).
In the Word the "heart" means the will, and "from the heart" means from the will (n. 2930, 7542, 8910, 9113, 10336).
In the Word the "heart" also signifies love, and "from the heart" means from love (7542, 9050, 10336).