879. 21:2 Then I, John, saw the holy city, New Jerusalem, coming down from God out of heaven. This symbolizes the New Church to be established by the Lord at the end of the previous one, which will be affiliated with the New Heaven and possess Divine truths in its doctrine and in its life.

John mentions himself by name here, saying "I, John," because as an apostle he symbolizes the goodness of love toward the Lord and the attendant goodness of life. Consequently he was more loved than any of the rest of the apostles, and at the Last Supper he reclined on the Lord's breast (John 13:23; 21:20). And this church, which is the subject here, has a similar symbolism.

That Jerusalem symbolizes the church will be seen in the next number. It is called a city and described as a city because of its doctrine and its life in accordance with that doctrine. For a city in the spiritual sense symbolizes doctrine (nos. 194, 712). It is called a holy city owing to the presence of the Lord, who alone is holy, and owing to the Divine truths from the Word that it has in it from the Lord, which are called holy (nos. 173, 586, 666, 852). And it is called new, because He who sat on the throne said, "Behold, I am making all things new" (Revelation 21:5). It is also said to be coming down from God out of heaven because it descends from the Lord through the New Christian Heaven, as said in no. 876 in the exposition of verse 1 in this chapter. For the church on earth is formed by the Lord through heaven, in order that heaven and the church may be in harmony and affiliated.

2021. 'For an eternal covenant' means conjunction with these people. This is clear from the meaning of 'a covenant' as conjunction, dealt with already in 665, 666, 1023, 1038; and that this conjunction is with those called 'the seed' is clear from the fact of its coming immediately after a reference to that 'seed', and of its being a second mention in this verse of a covenant. Thus the first mention of 'a covenant' has reference to the union of Jehovah with the Human Essence, and the second to the conjunction with those who are 'the seed'. To allow a clearer idea of the union of the Lord's Divine Essence with the Human Essence and of the conjunction of the Lord with the human race by means of the faith that inheres in charity, let the term union here and from now on be used to describe the first of these, and conjunction the second. Indeed the bond between the Lord's Divine Essence and Human Essence really was a union, but that between the Lord and the human race by means of the faith that inheres in charity is conjunction. From this it is clear that because Jehovah or the Lord is Life, His Human Essence became Life as well, as shown above. It was a union of life with life. Man however is not life but a recipient of life, as also shown already. When life flows into a recipient of life conjunction takes place, for life accommodates itself to the recipient as active does to passive or as that which in itself is living does to that which in itself is dead but made living from that which in itself is living. In the case of the principal and the instrumental, as they are called, they do indeed seem to have been joined together to exist as one. Nevertheless they are not one, for each exists by itself. Man does not live of himself, but the Lord in His mercy links him to Himself and in so doing causes him to live for ever. And because the Lord and man are distinct and separate from each other the term conjunction is used.