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.

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

352. Of the tribe of Gad twelve thousand were sealed. This symbolizes useful life endeavors, which are the exercises of wisdom springing from the aforesaid love, also in those people who will be in the New Heaven and in the Lord's New Church.

In the highest sense Gad symbolizes omnipotence; in the spiritual sense, goodness of life, which also is useful endeavor; and in the natural sense, work. Here he symbolizes useful life endeavors, because he comes after Reuben and Judah, and celestial love by means of wisdom produces useful endeavors.

There are three things that hang together and cannot be separated: love, wisdom and useful life endeavor. If one is taken away, the other two collapse. (See Angelic Wisdom Regarding Divine Love and Wisdom, nos. 241 297, 316.)

That Gad symbolizes useful life endeavors, called also fruits, can be seen from the derivation of his name from a word meaning a troop or accumulation (Genesis 30:10-11, Joshua 13:24-28). It can be seen, too, from his symbolism in an opposite sense (Isaiah 65:11, Jeremiah 49:1-3).

It should be known that the tribes of Israel here are all distinguished into four groups, as they were in the Urim and Thummim, and as they were in their encampment, and that each group contains three tribes, because the three go together as a unit, like love, wisdom and useful service, and like charity, faith and work. For, as we said, if one is missing, the other two have no reality.