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.

(Referenser: 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)

57. We can say the same of the church as we have of heaven, since the church is the Lord's heaven on earth. It also has many components, and yet each is called a church and is a church to the extent that the qualities of love and faith rule within it. In it, the Lord forms a single whole out of the varied elements, and therefore makes a single church out of many churches. ¹

Much the same can be said of the individual member of the church as has been said about the church in general, namely that the church is within and not outside, and that anyone is a church in whom the Lord is present in the qualities of love and faith. ²

Much the same can be said of the individual who has the church within as has been said about the angel who has heaven within, that such an individual is a church in least form as the angel is a heaven in least form. Even more, we can say that the individual who has the church within is a heaven just as much as an angel is, for we have been created to enter heaven and become angels. So anyone who has the quality of goodness from the Lord is an angel-person. ³

It is worth noting what we have in common with angels and what we possess that they lack. We have in common with angels the fact that our deeper levels are formed in the image of heaven and that we also become images of heaven to the extent that we participate in the qualities of love and faith. What we have that angels lack is that our more outward levels are formed in the image of this world; and that to the extent that we are engaged in what is good, the world within us is subordinated to heaven and serves it; ⁴ and that then the Lord is present with us on both levels as he is in his heaven. He is actually present on both levels in his divine order, for God is order. ⁵

Fotnoter:

3241. 'And the sons of Dedan were Asshurim, and Letushim, and Leummim' means the derivatives from the second division. This becomes clear from the representation of 'Dedan' as those governed by the good of faith, or to be precise, those governed by the truth of faith derived from good, 3240 (end). The fact that they are derivatives from the second division is self-evident. These three sons mean in particular the truths of faith derived from good, though just what each one means can indeed be stated but not confirmed from elsewhere in the Word since they are not mentioned again.

[2] In the Lord's kingdom there are countless variations to goods and truths, yet all those countless variations make up one heaven. Indeed there are so many that one community is in no sense exactly like another, that is, governed by the same good and truth, see 684, 685, 690. One heaven there is made up of many varying parts arranged by the Lord in such a way that they all accord. This accordance or harmony of the many is effected by the Lord through the relationship which each of them has to Him, 551. It is like the organs, members, and viscera of the body. None is exactly like another. Yet although they are all different from one another they nevertheless make one, through the relatedness of them all to one soul, and through this soul to heaven and so to the Lord. For anything that has no connection with the Lord is in reality nothing. From this it may be seen that specific differences in truth and good are countless. But the kinds of these, indeed the most general kinds, which belong to the spiritual Church, are meant by these sons and grandsons of Abraham by Keturah.

[3] Because members of the spiritual Church do not have perception, as those of the celestial Church do, of what good and truth are, but instead acknowledge as truths things which they have had to learn, they are therefore constantly engaged in discussion about them and in reasoning whether they are true. Everybody adheres to the teaching which his own Church upholds and calls it the truth. This is what gives rise to so many differences. Furthermore the majority make their minds up about goods and truths from appearances and illusions - each one in a different way from another. But no one does so from any perception; indeed they do not know what perception is. Since their understanding is so darkened as regards goods and truths of faith, it is no wonder that disagreements exist about the most essential truth of all, that is to say, about the Lord's Divine, His Human, and His Holy proceeding from these. Those who are celestial perceive that these are not three but one, but in the case of those who are spiritual a mental image of three remains, though they are willing to think of them as one. Since therefore disagreements exist regarding this most essential truth, it may be seen that the variations and differences in matters of doctrine are countless. From this one may know the origin of the derivatives meant by the names of those mentioned at this point. But although there are so many variations and differences in matters of doctrine, or so many derivatives, nevertheless they all together form one Church when everyone acknowledges charity to be the essential thing of the Church, or what amounts to the same, when everyone regards life as the end in view of doctrine - that is, when everyone asks, How does a member of the Church live? rather than, What does he think? For in the next life everyone is allotted a place by the Lord that accords with the good constituting his life, not with the truth he knows from doctrine separated from that good.