197. In the Apocalypse the New Jerusalem is thus described:
That in her there was light like unto a stone most precious, as it were a jasper atone shining like crystal. And she had a wall great and high, having twelve gates, and above the gates twelve angels, and the names of the twelve tribes of the sons of Israel written thereon. That the wall was a hundred and forty and four cubits, which was the measure of a man, that is, of an angel. That the building of the wall was of jasper, and its foundations were of every precious stone, jasper, sapphire, chalcedony, emerald, sardonyx, sardius, chrysolite, beryl, topaz, chrysoprase, hyacinth, and amethyst. That the gates were twelve pearls. That the city itself was pure gold like pure glass, and was four square and her length, breadth, and height were equal, twelve thousand furlongs; and so forth (21:11, 12, 16-21).
That all this is to be understood spiritually can be seen from what is set forth in the Apocalypse Revealed (n. 880), that "the New Jerusalem" means a new church that is to be established by the Lord. And since "Jerusalem" here signifies the church it follows that everything said of it as a city, of its gates, its wall, the foundations of its wall, and also its dimensions contains a spiritual sense, for whatever relates to the church is spiritual. What these things signify has been shown in the Apocalypse Revealed (n. 896-925); therefore further explanation would be superfluous. It is sufficient to know from this that there is a spiritual sense in every particular of the above description, like the soul in the body, and without that sense nothing relating to the church could be seen in what is there written; as, that the city was of pure gold, its gates of pearls, its wall of jasper, the foundations of the wall of precious stones; that the wall was one hundred and forty-four cubits, which is the measure of a man, that is, of an angel; that the city was twelve thousand furlongs in length, breadth, and height; and so on. But all this is understood by anyone who from a knowledge of correspondences is acquainted with the spiritual sense; as, that the wall and its foundations signify the doctrinals of that church drawn from the sense of the letter of the Word; also that the numbers twelve, one hundred and forty-four, and twelve thousand, signify all things of the church, that is, its truths and goods in one complex.