The concept of a "church" in the Writings is both complex and beautifully organic, linked with teachings on the nature of the Lord and the resulting nature of mankind.

The Writings say that the Lord, in His essence - His actual substance - is perfect, infinite love, a love that powered creation, that is the ultimate source of reality, and that sustains reality constantly. That love is expressed in form as perfect, infinite wisdom, which gave form to creation and gives form to reality.

Deep stuff! You can read more about that elsewhere, but what matters here is that all of creation, from the smallest elements to the whole of the universe, reflects that same structure. It's present in nature itself, powered by the heat (love) and light (wisdom) of the sun. It's present in the essential forms of life, with plants (which are rooted; which change little; which are unfeeling; which are powered by light) representing elements of wisdom and animals (warm, feeling, mobile, ever-changing, powered by heat) representing forms of love. It's present in the near-universal division into male (wisdom) and female (love) aspects of plants and animals alike.

That structure is also in each of us. In common language we might call these our hearts and our minds - what we want and what we think. The Writings commonly talk of them as good (love; what we want in our hearts) and truth (wisdom; what we know in our minds) or as will (heart) and understanding (mind). Not only do these elements define us, they are also key to our spiritual fates. We can use them to accept the Lord's love, come into the good of life and ultimately go to heaven. We can also use them to reject the Lord's love and trot off to hell.

And there are further layers. The Writings say that all human societies are in human form, with functions analogous to the human body. This is true from small groups like families to large companies to entire nations and ultimately to both the entire human race in this world and the entirety of heaven in the next.

Among the most important human societies are, naturally, churches. Since the concept of a "church" is based on the human form, though, churches as referred to in the Writings can take many forms. At one end of the scale, any one person who has true ideas of right and wrong and lives by them is a church himself or herself. At the other end of the scale, all those in the whole world who believe in love of the neighbor – and act from that belief – collectively make up one church.

Many other varieties lie between those two extremes, but most references to "church" in the Writings mean the community of those who have the Word, know the Lord, and follow His commandments. These people have access to the best possible truth and deepest possible understanding about the nature of the Lord and what He wants from us.

Such a church plays a vital role: The Lord works through it to get ideas about being good into people's minds and the desire to be good into the inner recesses of their hearts, reaching far beyond that church itself to touch everyone in the world. In fact, the Writings say there is in essence a marriage between the Lord and the church, with the church in the role of the bride and wife, producing true ideas and good desires the way a wife produces children.

To protect this function, the Lord has made sure that throughout history (and a good bit of prehistory) there has always been a church filling this role.

The first of these was the Most Ancient Church, represented by Adam; it was inspired by love of the Lord. The second was the Ancient Church, represented by Noah; it was inspired by love of the neighbor and knowledge of the Lord. The third was the Israelitish Church, which had no interior love of good but preserved ideas of the Lord. The fourth was the primitive Christian church, which had a new, more direct understanding based on the Lord's teachings. The fifth, according to the Writings, is to be based on the deeper understanding offered through the Writings and their explanations of the Bible.

There is much more that could be said, but we'll just emphasize one other point:

We as individuals are who we are based on what we love, not what we know. We will go to heaven or to hell based on what we love, not what we know. Knowing, thinking and seeking truth are important things, but their purpose is to shape, guide and serve our loves; love is ultimately what matters. The Writings make it abundantly and repeatedly clear that it is the same with churches: They are ultimately based on love, not knowledge, on their determination to serve the neighbor, not their external forms of worship. And if churches share that common purpose of serving the neighbor then they are in essence one, with doctrinal variations being of little consequence.

(References: Apocalypse Revealed 533; Arcana Coelestia 407, 768, 1799 [3-4], 2048, 2853 [2-3], 2910, 2982, 3310, 3773, 3963 [2], 4292, 4672, 4723, 5826 [2-3], 6637, 6648, 8152, 9256 [4-5], 9276 [2]; Conjugial Love 116; Heaven and Hell 57; The Word 8; The Doctrine of the New Jerusalem Regarding the Sacred Scripture 99, 104)

6648. 'And multiplied and became very very numerous' means that they increased enormously in truths from good. This is clear from the meaning of 'multiplying' as increasing in truths, dealt with in 43, 55, 913, 983, 2846, 2847; and from the meaning of 'became numerous' as further branching out, thus a constant increase in truth. The reason why it is an increase in truth from good is that the subject now is the Church when it has been established. For so far as the establishment of the Church with a person is concerned, it happens as follows: While it is being established the person is governed by truths, and through them good increases. But once the Church has been established with him he is governed by good, and from good by truths, which are then constantly increasing. Little increase takes place while he lives in the world, because in the world concerns about food and clothing and about other matters prevent it. But in the next life the increase is vast, and goes on for evermore; for there is no end to wisdom from the Divine. In this way the angels are constantly being made more perfect, and in that same way all entering the next life are made into angels; for every aspect of wisdom is capable of infinite expansion and the aspects of wisdom are infinite in number. From this it may be seen that wisdom can go on increasing for evermore and still not reach very far beyond the first degree, the reason for this being that the Divine is the Infinite, and what has its origin in the Infinite is inevitably like that.

4493. 'And they circumcised every male, all who went out of the gate of his city' means the acceptance of externalities. This is clear from the meaning of 'circumcising every male' as being introduced into the representatives and meaningful signs of that people (that is, into those of Jacob's descendants) - solely into the external observances involved in these, dealt with in 4486; and from the meaning of 'going out of the gate of the city' as departing from the doctrine of the Church among the Ancients, dealt with immediately above in 4492. And as the departure from doctrine and the acceptance of externalities is meant, the expression 'those who went out of the gate of his city' occurs twice, without any reference at the same time, as is so elsewhere, to those who went into it. For 'going in' means an acceptance of doctrine and a departure from externalities; but the reverse of this is described here.

[2] The implications of this must now be stated. Members of the Most Ancient Church, the remnants of which Hamor and Shechem with their families were a part, had an entirely different mental constitution and different disposition from adherents to the Ancient Church. The will in the case of the members of the Most Ancient Church contained that which was whole; but this was not so with adherents to the Ancient Church. Because of this the Lord was able with members of the Most Ancient Church to flow in through the will, and therefore by an internal way, but not so with adherents to the Ancient Church, since in these the will had been destroyed. But the Lord flowed into their understanding, and so not by an internal way but by an external one, as stated above in 4489. Flowing in through the will involves flowing in through the good of love, for all good belongs to the will part of the mind, whereas flowing in through the understanding involves flowing in through the truth of faith, for all truth belongs to the understanding part. Within the latter - the understanding - the Lord formed, in the case of adherents to the Ancient Church, a new will when He regenerated them. For goods and truths were implanted in the will part of the mind of members of the Most Ancient Church, see 895, 927, but in the understanding part of that of adherents to the Ancient Church, 863, 875, 895, 927, 2124, 2256, 4328. The new will is formed within the understanding part of the mind, 928, 1023, 1043, 1044, 4328. A parallelism exists between the Lord and the good residing with man, but not between Him and the truth there, 1831, 1832, 2718, 3514. As a consequence adherents to the Ancient Church dwelt in obscurity compared with members of the Most Ancient, 2708, 2715, 2935, 2937, 3246, 3833. From all this it may be seen that members of the Most Ancient Church had an entirely different mental constitution and different disposition from adherents to the Ancient Church.

[3] It was for this reason that those who belonged to the Most Ancient Church were internal people and had no external forms of worship, while those who belonged to the Ancient Church were external people and did have them. For the former saw external things in the light of internal ones, as if by the light of the sun in the daytime, whereas the latter saw internal things in the light of external ones, as if by the light of the moon or stars at night. This also explains why the Lord is seen by the former in heaven as the Sun, but by the latter as the Moon, 1521, 1529-1531, 2441, 2495, 4060. The former are those who in explanations above are called celestial, the latter those who are called spiritual.

[4] To illustrate the essential difference between the two let an example be taken. If a member of the Most Ancient Church had read the Word, the historical or the prophetical, he would have seen its internal sense without prior instruction or any explanation. He would have seen it so perfectly that the celestial and spiritual things belonging to the internal sense would have instantly met his eyes, and scarcely anything belonging to the sense of the letter. Thus the internal sense would have been for him in brightness, but the sense of the letter in obscurity. He would be like someone listening to a person speaking, and taking in only the sense and paying no attention to the words used by the speaker. But if a member of the Ancient Church had read the Word he would not have been able, without prior instruction or explanation, to see its internal sense, and so the internal sense would have been for him in obscurity but the sense of the letter in brightness. He would be like someone listening to a person speaking and in thought hanging on to the words used by him, all the while paying no attention to the sense of them, which would therefore be lost on him. But when a member of the Jewish Church reads the Word he does not understand anything beyond the sense of the letter. He does not know of and also denies the existence of any internal sense. And it is similar with the member of the Christian Church at the present day.

[5] These considerations show the essential difference between those represented here by Hamor and Shechem who, being part of the remnants of the Most Ancient Church, were interested in internal things and not in external ones, and those meant by the sons of Jacob who were interested in external things and not in internal ones. Those considerations show in addition that Hamor and Shechem could not have acceded to external things and accepted those which existed among the sons of Jacob unless their internals were closed. But if these had been closed they would have perished for ever.

[6] This is the hidden reason why Hamor and Shechem with their families were slain, a deed that would not otherwise have been allowed. Not that this absolves the sons of Jacob from blame for having committed that hideous crime. They had no knowledge of that hidden reason, nor did they have that as their end in view. Everyone is judged according to the end he has in view, that is, his intention; and it is plainly stated in verse 13 that their intention was deceitful. When the Lord allows any such crime as this it is carried out by the evil and by those in hell who instigate it. But all evil which the evil intend and do to the good the Lord converts into good, as is the case here in that Hamor and Shechem with their families were [eternally] saved.