Doctrine may be defined as organized truth that informs the way we act and think about the world.

In common usage, "doctrine" is not something that has to be grand or solemn. We all have doctrines about many little things like lawn care, car maintenance, or fixing chili; this kind of doctrine is just the way we do something because we think it is the right way. Often the reasoning behind these doctrines is that it is the way our parents did it, that we read it somewhere, or that it just seems right.

Everyone has a doctrine about how they live their lives in general as well, such as a charitable doctrine of looking out for others, or a selfish doctrine of "me first." Whether or not we have given it much thought, we live in accordance with our doctrine - our way of thinking.

Swedenborg used "doctrine" quite specifically to mean the organized arrangement of spiritual teachings about various aspects of reality. All religions have sacred beliefs, some of them written, like the Bible or the Quran, and some of them oral. From these beliefs they establish doctrine. In many cases organizations of the same religion will emphasize or reject different sets of truths and develop different forms of doctrine. Moreover, different religions will disagree about the validity of the original beliefs. But most would agree that the Truth, with a capital T, comes from some version of God.

The Writings for the New Church tell us that, in the Bible, cities represent doctrine. This was because cities were organized habitations, home ground to many people, places where there was much interchange of ideas and goods between people. They were places that could accommodate differing neighborhoods, and that could be fortified. On a spiritual plane all these things can be said about doctrine. It’s interesting to notice just how often cities are mentioned in the Word, either to be conquered, lived in, or built. Mention of a city comes as early as Genesis 4:17, just after the expulsion from the garden of Eden, where we are told that Cain built a city in the land of Nod and named it after his son, Enoch. Then in Genesis 11, men are not only building the well-known tower of Babel, but also a city of which the tower was a part. There are hundreds of other cities mentioned, and they signify different structures of doctrine.

Finally, in the next to last chapter of the Word (Revelation 20) we are told of the descent from God of the City New Jerusalem, coming down to earth. We in the New Church believe that this City represents a new doctrine, given by the Lord, written down and published by Emanuel Swedenborg in the 1700s, that resolves the false ideas that came into Christianity with the ideas of three persons in God, and with the later belief in salvation by faith alone.

New Christian doctrine holds that there is one God - one Divine Person who is the Lord God Jesus Christ, and that salvation requires a joining of faith and charity (a belief in true ideas, and a love for God and the neighbor).

(Verweise: Apocalypse Revealed 320, 902; Arcana Coelestia 399, 402, 3364 [2]; Teachings about the Sacred Scripture 54; The Doctrine of the New Jerusalem Regarding the Lord 63; The New Jerusalem and its Heavenly Doctrine 7; True Christian Religion 508 [5])

902. 21:14 And the wall of the city had twelve foundations. This symbolically means that the Word in its literal sense contains all of the doctrines of the New Church.

The wall of the city symbolizes the Word in its literal sense (no. 898), and its twelve foundations symbolize all of the doctrines of the church - its foundations symbolizing doctrines, and the number twelve all. The church, moreover, is founded on doctrine, for it teaches how a person is to believe and live, and its doctrine is to be drawn only from the Word. That it is to be drawn from the Word's literal sense may be seen in The Doctrine of the New Jerusalem Regarding the Sacred Scripture, nos. 50-61.

Since the twelve foundations of the wall of the city New Jerusalem symbolize all of the church's doctrine, and the church is a church by virtue of its doctrine, therefore its foundations are described in more detail in verses 19 and 20 below.

The foundations of the earth are mentioned a number of times in the Word, and they do not mean the foundations of the earth, but the foundations of the church, inasmuch as the earth symbolizes the church (no. 285). And the foundations of the church are only ones that come from the Word and are called doctrines. For it is the Word itself that provides a foundation for the church.

[2] Doctrines drawn from the Word are symbolized by foundations also in the following passages:

Have you not understood the foundations of the earth? (Isaiah 40:21)

I will put My words in your mouth... to plant the heavens and found the earth... (Isaiah 51:16)

They do not acknowledge, they do not understand, they walk in darkness, all the foundations of the earth shake. (Psalms 82:5)

...the Word of Jehovah... who stretches out the heavens, lays the foundations of the earth, and forms the spirit of man within him. (Zechariah 12:1)

Jehovah... kindled a fire in Zion, which has devoured its foundations. (Lamentations 4:11)

The impious... shoot in darkness the upright in heart, because the foundations are being destroyed... (Psalms 11:2-3)

Hear, O mountains, Jehovah's quarrel, you strong foundations of the earth; for Jehovah has a quarrel with His people... (Micah 6:2)

...the floodgates on high are open, and the foundations of the earth are shaken. The earth is violently broken, the earth is split open, the earth is shaken... (Isaiah 24:18-20)

And so on elsewhere, as in Isaiah 14:32; 48:13; 51:13; Psalms 24:2; 102:25; 104:5-6; 2 Samuel 22:8, 16.

Whoever does not think that the earth symbolizes the church cannot help but think only naturally, even materially, when he reads in these places about the foundations of the earth. So it would be also if he were not to think of the city Jerusalem here as symbolizing the church when he reads about its wall, gates, foundations, streets, dimensions, and more, which are described in this chapter as features of a city, when in fact they are features of the church and so must be interpreted not materially, but spiritually.