727. And pearls, signifies the knowledges of good and truth which are of the Word with them. By "pearls," in the spiritual sense, are signified the knowledges of good and truth both celestial and spiritual which are from the Word, particularly from the sense of its letter; and because "pearls" signify those knowledges, they are therefore named after "purple and scarlet," and after "gold and precious stones." The same knowledges are signified by pearls in the following passages:
The kingdom of the heavens is like unto a merchant seeking beautiful pearls; who, when he had found one precious pearl, went and sold all that he had, and bought it (Matt. 13:45-46).
By this is signified knowledge concerning the Lord.
The twelve gates of the wall of the New Jerusalem were twelve pearls, everyone of the gates was one pearl (Rev. 21:21).
"The gates of The New Jerusalem" signify introduction into the New Church, and introduction is effected by the knowledges of good and truth from the Word.
Neither cast ye your pearls before swine, lest they trample them under their feet, and rend you (Matt. 7:6).
By "swine" are signified they who only love worldly riches, and not spiritual riches, which are the knowledges of good and truth from the Word. Because by "Babylon" is signified that religious persuasion by which all the knowledges of good and truth derived from the Word were rejected, it is said of her:
And the merchants of the earth shall weep and mourn over Babylon, for no one buyeth their merchandise; the merchandise of gold and silver, of precious stone and of pearls (Rev. 18:11-12).