2943. 'To all entering into the gate of his city, saying' means matters of doctrine through which one comes to faith. This is clear from the meaning of 'a gate' as a place of entry and so as that which, in the same way as a door, leads in, dealt with in 2145, 2152, 2356, 2385, and from the meaning of 'a city' as truth, which constitutes faith, dealt with in 402, 2268, 2449, 2451, 2712. In the Ancient Church a city was not like the city of later or of modern times. That is to say, a city did not consist of a collection or gathering together of individuals but of separate families living side by side. A family descended from the same forefather constituted a city. The city of Nahor, for example, to which Abraham's servant went to betroth Rebekah to Isaac, Genesis 24:10, consisted of the family of Nahor which was there. And Shalem, the city of Shechem, to which Jacob came after his departure from Paddan Aram, Genesis 33:18 and the whole of Chapter 34, consisted of the family of Hamor and Shechem which was there. And the same was so with all other cities in those times.

[2] And as it had come down to them from the most ancient people that nations and families represented heavenly communities, and so the things of love and charity, 685, 1159, therefore when a city is mentioned instead of a family, and a people instead of a nation, truth that constitutes faith is meant. It is also why in the genuine sense the city of God and the holy city mean faith in the Lord. And as 'a city' meant faith, 'the gate of the city' means matters of doctrine through which one comes to faith. The same was also meant in the Jewish representative Church by the judges and elders sitting in the gate of the city and giving judgement there, as is evident from historical sections of the Word, and also in Zechariah,

These are the things that you shall do: Speak the truth, everyone to his companion; judge in your gates the truth and the judgement of peace. Zechariah 8:16.

And in Amos,

Hate evil, and love good, and establish judgement in the gate. Amos 5:15.

'A gate' also means the place of entry into the rational mind, and the rational mind is compared to a city, see 2851.

687. This being the nature of heaven, no angel or spirit can possibly have any life unless he lives in some community, and in so doing in a harmonious relationship of many people. A community is nothing else than the harmonious relationship of many, for one person's life in no sense exists in isolation from the life of others. Indeed no angel, spirit, or community can possibly have any life, that is, be moved by good to will anything, or be moved by truth to think anything, if he is not joined to heaven and to the world of spirits through the many in his own community. The same applies to the human race. No one whatever, no matter who, can possibly live, that is, be moved by good to will anything, or be moved by truth to think anything, unless he has in like manner been joined to heaven through the angels residing with him, and to the world of spirits, and even to hell through the spirits residing with him.

[2] For everyone during his lifetime is dwelling in some community of spirits or angels, although he is not conscious of doing so. And if he is not joined to heaven or the world of spirits by means of the community in which he lives, he cannot go on living one moment longer. It is like the parts of the human body. Any part of it which is not joined to the rest by means of fibres and vessels, and so by means of various functions, is not part of the body. It is instantly removed and expelled as that which has no life.

[3] The very communities in which and among which people have lived during their lifetime are shown to them once they have entered the next life. When they enter such a community after the life of the body, they enter into the very life that had been theirs while in the body, and from that life they start a new one. And so according to the life they have led in the body they either go down to hell or are raised up to heaven.