Jerusalem, on Mount Zion, signifies the doctrine of love to the Lord, and how it governs your life. Jerusalem first comes to our attention in 2 Samuel 5, when King David takes the city from the Jebusites and makes it his capital. In the next chapter he brings the Ark of the Covenant there, and later it is where Solomon builds the temple, and his own palace. From then on Jerusalem is the center of worship of the Israelitish church. It is the place where the Lord was presented in the temple as a baby, where He tarried to talk to the priests at age twelve, where He cleansed the temple, had the last supper, was crucified and then rose. It is a central place in both the old and new Testaments. The city was built on Mount Zion, the highest point of the mountains of Judea. A city, in the Word, represents doctrine, the organized knowledge of the truths of the church. Mountains represent love of the Lord and the consequent worship. If you put those things together, Jerusalem on Mount Zion signifies the doctrine of love to the Lord, and how it governs your life. This is why David was led to make Jerusalem the most important city of the land, and why all worship was conducted there. And this is also why Jeroboam was condemned for introducing idol worship in Samaria. In the Book of Revelation, John's vision of the city New Jerusalem descending from God is a prophecy of a new dispensation of doctrine coming from the Lord.

(Референце: Arcana Coelestia 4539, 8938; The Apocalypse Explained 365 [35-38])

476. And have made their robes white in the blood of the Lamb, signifies the implantation of Divine truth from the Lord. This is evident from the signification of "making robes white," as meaning to put off falsities and to put on truths, for "white" and "to be made white," are predicated of truths, and these are signified by "robes." (That "white" and "to be made white," are predicated of truths, see above, n. 196; and that "robes" signify truths in general see above, n. 395.) It is said "made their robes white," because the garments of those who are in falsities appear in the spiritual world dusky and also spotted, and the garments of those who are in temptations appear filthy; but as soon as they emerge from temptations, as they have then been imbued with Divine truths, white and shining garments without spots appear upon them, as was mentioned just above. This is why "they have made their robes white" signifies that they have put off falsities and put on truths. The above is evident also from the signification of "the blood of the Lamb" as being Divine truth proceeding from the Lord (of which above, n. 329 e New Jerusalem 293, 294, and in the extracts there from the Arcana Coelestia.) This can be seen from this also, that the garments of angels appear glistening from what is white and bright, not from faith in and thought about the blood of the Lord on the cross, but from Divine truth with them from the Lord; for, as was said above, their garments are all in accord with the truths with them; nor is any angel permitted to think of the Lord's passion, but only of His glorification, and of the reception by Him of the Divine.); and because in temptations falsities are shaken off, and truths are implanted, so in general, "they have made their robes white in the blood of the Lamb" signifies the implantation of Divine truth from the Lord. In the sense of the letter of the Word, "the blood of the Lamb" means the passion of the cross, but in the internal or spiritual sense it means Divine truth proceeding from the Lord; for it is by this that man is purified from falsities and evils, that is, his garments are made white. The passion of the cross was the Lord's last temptation, by which He fully subjugated the hells, and glorified His Human; and when this was accomplished and completed, the Lord sent the Comforter, the Spirit of Truth, by which is meant Divine truth proceeding from His glorified Human, as the Lord teaches in John (John 7:39) and elsewhere. It is by means of Divine truth, when it is received, that man is reformed and regenerated by the Lord and saved, and not by the shedding of blood on the cross. (On this more may be seen in The Doctrine of the New Jerusalem 293-294.)