574. And I heard the number of them.- This signifies their quality perceived, as is evident from the signification of hearing, as denoting to perceive (see above, n. 14, 529); and from the signification of number, as denoting the quality of the thing treated of, concerning which, see above (n. 429); here, the quality of the falsities of evil that conspire against the truths of good, from which and on behalf of which are the reasonings of the sensual man, which are signified by the number of the armies of the horsemen, spoken of just above. But the quality of these is further described in the next verse in these words: "And thus I saw the horses in the vision, and them that sat on them, having breast-plates fiery, and purple, and sulphurous; and the heads of the horses as the heads of lions; and out of their mouths went forth fire, smoke, and brimstone." These words are expressive of the quality that is here signified by number. Some reference to number appears to be meant here by number, but in the spiritual world numbers do not exist, for spaces and times there are not measured and determined by numbers, as in the natural world, therefore all numbers, in the Word, signify things, and the number itself signifies the quality of the thing treated of, see above (n. 203, 336, 429, 430); and in Heaven and Hell 263).

589. THE EQUILIBRIUM BETWEEN HEAVEN AND HELL.

For any thing to have existence there must be an equilibrium of all things. Without equilibrium is no action and reaction; for equilibrium is between two forces, one acting and the other reacting, and the state of rest resulting from like action and reaction is called equilibrium. In the natural world there is an equilibrium in all things and in each thing. It exists in a general way even in the atmosphere, wherein the lower parts react and resist in proportion as the higher parts act and press down. Again, in the natural world there is an equilibrium between heat and cold, between light and shade, and between dryness and moisture, the middle condition being the equilibrium. There is also an equilibrium in all the subjects of the three kingdoms of nature, the mineral, the vegetable, and the animal; for without equilibrium in them nothing can come forth and have permanent existence. Everywhere there is a sort of effort acting on the one side and reacting on the other.

[2] All existence or all effect is produced in equilibrium, that is, by one force acting and another suffering itself to be acted upon, or when one force by acting flows in, the other receives and harmoniously submits. In the natural world that which acts and reacts is called force, and also endeavor [or effort]; but in the spiritual world that which acts and reacts is called life and will. Life in that world is living force, and will is living effort; and the equilibrium itself is called freedom. Thus spiritual equilibrium or freedom has its outcome and permanence in the balance between good acting on the one side and evil reacting on the other side; or between evil acting on the one side and good reacting on the other side.

[3] With the good the equilibrium is between good acting and evil reacting; but with the evil the equilibrium is between evil acting and good reacting. Spiritual equilibrium is between good and evil, because the whole life of man has reference to good and to evil, and the will is the receptacle. There is also an equilibrium between truth and falsity, but this depends on the equilibrium between good and evil. The equilibrium between truth and falsity is like that between light and shade, in that light and shade affect the objects of the vegetable kingdom only so far as heat and cold are in them. That light and shade themselves have no effect, but only the heat that acts through them, is evident from the fact that light and shade are the same in winter time and in spring time. This comparison of truth and falsity with light and shade is from correspondence, for truth corresponds to light, falsity to shade, and heat to the good of love; in fact, spiritual light is truth, spiritual shade is falsity, and spiritual heat is good of love (see the chapter where light and heat in heaven are treated of, 126-140).