79. That to "commit adultery" in the spiritual sense means to adulterate the good of the Word and to falsify its truth, is evident from the following passages:
Babylon hath made all the nations drink of the wine of her fornication (Rev. 14:8).
The angel said, I will show thee the judgment of the great harlot that sitteth upon many waters, with whom the kings of the earth have committed fornication (Rev. 17:1, 2).
Babylon hath made all the nations drink of the wine of the wrath of her fornication, and the kings of the earth have committed fornication with her (Rev. 18:3).
God hath judged the great harlot who did corrupt the earth with her fornication (Rev. 19:2).
"Whoredom" is predicated of Babylon, because "Babylon" means those who arrogate to themselves the Lord's Divine sovereign power, and profane the Word by adulterating and falsifying it; and for this reason Babylon is called:
The mother of the whoredoms and of the abominations of the earth (Rev. 17:5).
 The same is signified by "whoredom" in the prophets, as in Jeremiah:
In the prophets of Jerusalem I have seen a horrible obstinacy in committing adultery and walking in lying (23:14).
And in Ezekiel:
Two women, the daughters of one mother, committed whoredom in Egypt; they committed whoredom in their youth; the one committed whoredom when she was Mine, and doted on her lovers the Assyrians her neighbors; she bestowed her whoredoms upon them, yet she forsook not her whoredoms in Egypt; the other corrupted her love more than she, and her whoredoms were more than the whoredoms of her sister; she added to her whoredoms, she loved the Chaldeans, the sons of Babel came to her to the bed of loves, and defiled her with their whoredom (23:2-17).
These things are said of the Israelitish and the Jewish Church, here called the "daughters of one mother." Their "whoredoms" mean adulterations and falsifications of the Word, and as in the Word "Egypt" signifies memory-knowledge, "Assyria" reasoning, "Chaldea" the profanation of truth, and "Babel" the profanation of good, it is said that they "committed whoredom" with them.  The same is said of "Jerusalem," by which is signified the church in respect to doctrine:
Thou didst trust in thy beauty, and didst commit whoredom because of thy renown, so that thou pouredst out thy whoredoms on everyone that passed by; thou hast committed whoredom with the sons of Egypt thy neighbors, great of flesh, and hast multiplied thy whoredom; thou hast committed whoredom with the sons of Asshur; and when thou wast not satisfied with those with whom thou didst commit whoredom, thou hast multiplied thy whoredoms unto the land of traffic, to Chaldea. An adulterous woman that receiveth strangers instead of her husband! All give hire to their harlots, but thou hast given hire to all thy lovers that they may come unto thee on every side in thy whoredoms.
Wherefore, O harlot, hear the word of Jehovah (Ezek. 16:15, 26, 28-29, 32-33, 35).
That "Jerusalem" means the church may be seen in the Doctrine of the Lord (n. 62-63).
(The like is signified by "whoredoms" in Isa. 23:17, 18; 57:3; Jer. 3:2, 6, 8, 9; 5:1, 7; 13:27; 29:23; Micah 1:7; Nahum 3:4; Hos. 4:10, 11; Lev. 20:5; Num. 14:33; 15:39; and elsewhere.)
For the same reason the Lord called the Jewish nation:
An adulterous generation (Matt. 12:39; 16:4; Mark 8:38).