446. There is an inmost communication of the spirit with the breathing and with the beating of the heart, the spirit's thought communicating with the breathing, and its affection, which is of love, with the heart;# consequently when these two motions cease in the body there is at once a separation. These two motions, the respiration of the lungs and the beating of heart, are the very bond on the sundering of which the spirit is left to itself; and the body being then deprived of the life of its spirit grows cold and begins to decay. This inmost communication of the spirit of man is with the respiration and with the heart, because on these all vital motions depend, not only in general but in every particular.## # The heart corresponds to the will, thus to the affection which belongs to the love, while the respiration of the lungs corresponds to the understanding, thus to the thought (n. 3888). From this the "heart" in the Word signifies the will and love (n. 7542, 9050, 10336). The "soul" signifies understanding, faith, and truth; therefore "from the soul and from the heart" signifies what is from the understanding, faith, and truth, and what is from the will, love, and good (n. 2930, 9050). The correspondence of the heart and lungs with the Greatest Man, or heaven (n. 3883-3895). ## The beating of the heart and the respiration of the lungs reign in the body throughout, and flow mutually into every part (n. 3887, 3889, 3890).