366. That they should kill one another. That this signifies the falsification or extinction of truths, is manifest from the signification of killing, as denoting to extinguish truths; for by killing in the Word is signified to kill spiritually, or to kill the spiritual part of man or his soul, which is to extinguish truths. The reason why it also denotes to falsify, is, because when truths are falsified, they are also extinguished; for by falsification a different understanding of them is arrived at, and truth is truth according to the understanding of any one concerning it; for the love and the principle which have rule in man, draw and apply all things to them, even truths themselves; wherefore, when the love is evil, or the principle false, then the truths are infected with the evil of the love, or the falsity of the principle, and so are extinguished; this therefore is what is here signified by, "that they should kill one another." That this takes place when there is no good with man, and especially when there is no good in the doctrine of his church, is manifest from the preceding words, where it is said: "When he had opened the second seal, there went out a red horse; and it was given to him that sat thereon to take peace from the earth"; by which is signified a second state of the church, when the understanding of the Word is destroyed as to good, whence divisions arise in the church (concerning which see above, n. 361, 364, 365).

[2] That the understanding of the Word, or, what is the same, the understanding of truth, is destroyed when there is no good with man, that is, where there is no love to the Lord and charity towards the neighbour, may be seen above (n. 365); for good in man, or what is the same, love in him, is the fire of his life, and truth in him, or the faith of truth, is the light thence; therefore according to the quality of the good or the quality of the love in him, such is the truth, or the faith of truth in him. Hence it is evident that if man is in evil, or in an evil love, he cannot be in the truth, or in the faith of truth; for the quality of the light which issues from that fire, is light to those who are in hell, which is a fatuous light, like the light from burning coals, which light is turned into mere darkness from the light flowing in from heaven. Such also is the light called natural light (lumen) with the evil, when they reason against the things of the church.

[3] That they should falsify truths and thereby extinguish them, is also meant by the Lord's words in Matthew:

Jesus said to the disciples, "The brother shall deliver up the brother, the father the son; the children shall rise up against the parents, and cause them to be put to death" (10:21).

And in Luke:

"Ye shall be betrayed by parents, and brethren, and kinsfolk, and friends; and some of you shall they cause to be put to death" (21:16).

By parents, brethren, children, [kinsfolk,] and friends, are not meant here parents, brethren, children, kinsfolk, friends, nor by disciples are meant disciples, but the goods and truths of the church, also evils and falsities; and that evils will extinguish goods, and falsities truths. (That such things are signified by these names, see the Arcana Coelestia 10490.)

634. It is extremely difficult however to state intelligibly what the understanding of truth and the will for good are, properly speaking. The reason is that everything man thinks he ascribes to the understanding because he calls it so, and everything he desires he ascribes to the will because he calls it so. And it is even more difficult to state what they are in an intelligible way because the majority nowadays are also unaware that what belongs to the understanding is distinct and separate from what belongs to the will; for when they think something they say that they will it, and when they will something they say that they think it. Their speaking in this way is thus one reason for the difficulty. And a further reason why it is difficult to grasp the matter is that such people are engrossed solely in bodily interests, that is, their life consists in things of a more external nature.

[2] For these same reasons people are also unaware of the fact that with everybody there exists something interior, something more interior still, and indeed something inmost, and that the bodily and sensory part of a person is the most external. Desires and things of the memory are interior, affections and rational concepts more interior still, while the will for good and the understanding of truth are the inmost. Nothing could possibly be more distinct and separate than these are from one another, yet a bodily-minded man sees no difference at all, and so confuses them all with one another. This is the reason why he believes that when his physical body dies, everything else will die as well, when in reality only at that point does he start to live, and to do so indeed through his own interior things which are arranged in consecutive order. Unless man's interior things were distinct and separate in this way and arranged consecutively, men could not possibly be spirits, angelic spirits, or angels in the next life, all of whom differ in this way from one another according to things that are interior. Consequently the three heavens are very distinct and separate from one another. From all these considerations it now becomes clear to some extent what the understanding of truth and the will for good are, properly speaking, and that they are attributable only to the celestial man, or angels of the third heaven.