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)

6637. 'These are the names of the children of Israel' means the essential nature of the Church. This is clear from the meaning of' the name as the essential nature, dealt with in 144, 145, 1754, 1896, 2009, 2628, 2724, 3006, 3421; from the representation of 'the sons of Israel' as spiritual truths, dealt with in 5414, 5879, 5951; and from the representation of 'Israel' as the good of truth, which is spiritual good, dealt with in 3654, 4598, 5803, 5806, 5812, 5817, 5819, 5826, 5833. Since Israel' represents the good of truth or spiritual good and 'his sons' represent spiritual truths in the natural, 'the sons of Israel' also represent the Church, for what makes it the Church is spiritual good and the truths that spring from that good. A person without spiritual good, that is, the good of charity, and without spiritual truths, that is, the truths of faith, does not belong to the Church in spite of having been born within the Church. The whole of the Lord's heavenly kingdom possesses the good of love and faith, and unless the Church possesses good like that it cannot be the Church since it is not joined to heaven; for the Church is the Lord's kingdom on earth.

[2] The term 'Church' is not used because it is the place where the Word is and teachings drawn from it, or because it is where the Lord is known and the sacraments are celebrated. Rather it is the Church because it lives in accordance with the Word or with teachings drawn from the Word, and seeks to make those teachings its rule of life. People who do not live like this do not belong to the Church but are outside it; and those who lead wicked lives, thus lives contrary to that teaching, are further away outside the Church than gentiles who know nothing whatever about the Word, the Lord, or the sacraments. For since those people are acquainted with the forms of good that the Church fosters and with the truths it teaches they annihilate the Church within themselves, something gentiles cannot do because they are unacquainted with those things. It should also be realized that everyone who leads a good life, in charity and faith, is a Church, and is a kingdom of the Lord. He is for that reason also called a temple, and a house of God too. Those who are Churches individually, no matter how remote from one another they may be, constitute one Church collectively. This then is the Church meant by the expression 'the children of Israel' here and in what follows.

10396. 'And the people saw that Moses delayed to come down from the mountain' means the Israelite nation, when they did not discern in the Word anything from heaven. This is clear from the meaning of 'seeing', when it refers to the understanding of the Word, as discernment, dealt with in 2150, 3764, 3863, 4567, 4723, 5400; from the representation of 'Moses' as the Word, dealt with in the places referred to in 9372; from the meaning of 'delaying to come down', when this refers to discernment of Divine Truth obtained from the Word, as not flowing in, for Divine Truth which flows in and resides with a person is said to come down from heaven; and from the meaning of 'Mount Sinai' as heaven in respect of Divine Truth, dealt with in 9420. 'The people' is used here literally to mean the Israelite nation; for this chapter deals with that nation, with what it was like in its discernment of Divine Truth obtained from the Word, and in its discernment of the inner realities that were represented within the things which Jehovah commanded the children of Israel from Mount Sinai through Moses - the things contained in the previous chapters, Exodus 25-Exodus 31 inclusive. From all this it is clear that 'the people saw that Moses delayed to come down from the mountain' means the Israelite nation, when they did not discern in the Word anything from heaven, nor for this reason anything that was represented in the measures commanded from Mount Sinai, that is, the inner realities.

[2] The situation in all this is that the subject in the chapters immediately before has been the statutes, judgements, and laws which Jehovah commanded the children of Israel, among whom a Church was to be established. Each one of these was an external regulation representing something internal, as has been shown in the explanations of those chapters. But the character of the Israelite nation was such that they did not wish to know anything whatever about the inner realities that were represented, only about the outward forms that served to represent them. The reason why that nation was like this was that they were ruled completely by bodily and earthly kinds of love; and with those who are ruled by those kinds of love their interiors, which would otherwise lie open to heaven, are closed off. Everyone has an internal and an external; the internal exists for heaven's purposes, and the external for the world's purposes. When the external is dominant, worldly, bodily, and earthly interests reign; but when the internal is dominant, heavenly ones do so. The human being has been created in such a way however that the external may be subordinate to the internal, thus the world within him may be subordinate to heaven; for as has been stated, the external exists for the world's purposes, and the internal for heaven's. When therefore the external is dominant the internal is closed, because then a person turns himself away from heaven and the Lord towards the world and self; and the place he turns to is where his heart is, consequently where his love is and together with that love the whole of his life, since a person's life consists in his love.

[3] These things have been mentioned in order that people may know what the situation is with those who are ruled by bodily and earthly kinds of love, namely that such people's interiors are closed off; and those whose interiors are closed off do not acknowledge anything internal. Only those things which they see with their eyes or touch with their hands they say exist, and all else which they do not see with their eyes or touch with their hands they say do not exist. Consequently they have no belief at all in the existence of heaven, in life after death, or in the inner realities taught by the Church. This was what the Israelite nation was like; and the present chapter shows that they were such.

[4] Anyone who does not know that inner realities compose the Church with a person, and not outward things without them, cannot do other than suppose that this nation was chosen and also loved by Jehovah in preference to all others. But the truth of the matter is entirely different. They were accepted because they insisted on it, yet not in order that any Church might exist among them, only what was representative of a Church, to the end that the Word could be written, with such things constituting its lowest level. The reason why in the Word that nation is called Jehovah's people, the nation chosen and loved [by Him], is that in it Judah is used to mean the celestial Church, Israel the spiritual Church, and each son of Jacob some aspect of the Church. Furthermore Abraham, Isaac, and Jacob serve to mean the Lord Himself, and so do Moses, Aaron, and David. But since the subject in the whole of this chapter is that nation, and the fact that no Church could be established among them, only what was representative of a Church, please see, before anything further is presented, what has been stated and shown previously regarding that nation,

No Church existed with that nation, only what was representative of a Church, 4281, 4288, 4311, 4500, 4899, 4912, 6304, 7048, 9320.

Thus they were not chosen, only accepted because they insisted on it, 4290, 4293, 7051, 7439.

They were entirely restricted to external things devoid of anything internal, 4293, 4311, 4459(end), 4834, 4844, 4847, 4865, 4868, 4874, 4903, 4913, 9320, 9373, 9380, 9381.

Their worship was merely external, 3147, 3479, 8871.

Nor did they wish to know about the inner things of worship and of the Word, 3479, 4429, 4433, 4680.

Therefore they were not allowed to know those things, 301, 302, 304, 2520, 3769.

If they had known them they would have rendered them profane, 3398, 3489, 4289.

Nevertheless through the outward things of worship among them, which were representative of inner realities, there was contact with heaven, and in what way, 4311, 4444, 6304, 8588, 8788, 8806.

When they were engaged in worship their interiors, which were foul, were closed, 3480, 9962.

This was possible among that nation, which is why they have been preserved even to the present day, 3479, 4281, 6588, 9377.

They worshipped Jehovah, but no more than His name, 3732(end), 4299, 6877.

At heart they were idolaters, 4208, 4281, 4820, 5998, 6877, 7401, 8301, 8882.

In general, they were the worst nation, 4314, 4316, 4317, 4444, 4503, 4750, 4751, 4815, 4820, 4832, 5057, 7248, 8819, 9320.