2. Before the New Jerusalem and its doctrine are treated of, something shall be said of the New Heaven and the New Earth. What is meant by "the first heaven and the first earth," which passed away, is shown in the small work Last Judgment and Babylon Destroyed. Immediately after that event, that is, after the Last Judgment was completed, a New Heaven was created or formed by the Lord. This heaven was formed of all those who, from the coming of the Lord to the present time, had lived the life of faith and charity, since these alone were forms of heaven. For the form of heaven, according to which all consociations and communications therein are effected, is the form of the Divine truth from the Divine good proceeding from the Lord; and this form man as to his spirit acquires by a life according to the Divine truth. That the form of heaven is thence may be seen in the work on Heaven and Hell (n. 200-212), and that all the angels are forms of heaven (n. 51-58, and 73-77). From these things it may be known, who they are of whom the New Heaven consists; and thereby what its quality is, namely, that it is altogether unanimous. For he who lives the life of faith and charity, loves another as himself, and by love conjoins him to himself, and thus reciprocally and mutually; for in the spiritual world, love is conjunction. Wherefore, when all act thus, then from many, yea from innumerable individuals consociated according to the form of heaven, unanimity exists, and they become as one; for then nothing separates and divides, but everything conjoins and unites.

4492. All that went out of the gate of his city. That this signifies that they would recede from the doctrine of the Church among the Ancients, is evident from the signification of “going out,” as here being to recede; and from the signification of the “gate of a city,” as being doctrine (see n. 2943, 4477), here the doctrine of the Church among the Ancients, because it was the gate of “his city,” that is, of Shechem, for by Shechem is represented the truth of the Church among the Ancients (n. 4454). As before said, by the Church among the Ancients is meant that which was from the Most Ancient Church. How the case herein is will appear from what now follows.

3216. So that an even better knowledge may be had of the nature of representatives in the next life, that is to say, of the things that are seen in the world of spirits, let several examples also be given. When with angels a discussion is taking place about matters of doctrine regarding charity and faith, there is sometimes seen in that lower sphere where the corresponding community of spirits is situated the visible idea of a city or of cities with palaces in them. The architecture of these is so astounding that you would say architectural art itself existed there and was the inspiration of everything there. In addition the houses there are of varying appearance. And the marvel of it is that in every single palace or house not even the smallest point or tiniest visible detail exists that does not represent some aspect of the idea and discussion among the angels. From this it becomes clear how countless the details are which they contain, and also what was meant in the Word by the cities seen by prophets - what is meant by the Holy City or New Jerusalem, and also by the cities mentioned in the prophetical part of the Word, namely matters of doctrine regarding charity and faith, 402, 2449.