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)

3773. 'And they would put the stone back in its place over the mouth of the well' means that it was closed up for the time being. This is clear from what has been stated about the stone over the mouth of the well, in 3769, 3771. With regard to these considerations, namely that the Word was uncovered for the Churches and after that closed up, the position is that in the beginning, when any Church is established, the Word is in that initial period closed up to them but later on, through the Lord's provision, is opened up. And from there people learn that all doctrine is based on these two commandments, that the Lord is to be loved above everything else, and the neighbour as themselves. When these two commandments are the end in view the Word is in that case opened up, for all the Law and all the Prophets, that is, the whole of the Word, hangs on them, as does everything from them, and so everything has reference to them. And being in that case governed by the primary teachings concerning truth and good people receive light in each particular thing they see in the Word. For the Lord is present with them at that time by means of angels and is teaching them even though they are not directly aware of it, and is also guiding them into the life of truth and good.

[2] This may also be seen from the consideration that in their infancy all Churches have been such, and have from love worshipped the Lord, and have from the heart loved the neighbour. But in course of time Churches have moved away from these two commandments, and have turned away from good flowing from love and charity towards those things called matters of faith, and so have turned away from life towards doctrine. And to the extent this happens the Word is closed up. These are the factors meant in the internal sense by the words, 'Behold, a well in the field, and behold, three droves of a flock there, lying nearby it; for out of that well they watered the droves; and there was a large stone over the mouth of the well. And all the droves would be gathered there; and they would roll the stone from over the mouth of the well and water the flock; and they would put the stone back in its place over the mouth of the well'.

4352. 'And fell on his neck' means a second joining together involving everything included within that universal embodiment of truth. This is clear from the meaning of 'falling on the neck' as a closer joining together since it is a closer kind of embrace. Furthermore 'the neck' in the internal sense means the influx and communication of interior things with exterior, and therefore means a joining together of them, see 3542, 3603. The reason why this is a joining together of everything - or with everything - within that universal embodiment of truth is that Jacob, to whom 'his' refers here, means the universal embodiment of every kind of truth, 4346.

[2] The joining together of good and truths within the natural is described here, and the nature of that joining together is as follows: Good flows by way of the internal man into the external man, where it joins itself to the truths which have been introduced by way of the external man. For the good which flows in by way of the internal man is the good of love; indeed no good exists, spiritual or celestial, which is not the good of love. Love is the source of such good and the reason why it is called good with man. It is the actual love present within good and going with good that effects any joining together. Unless love were present within and at hand no joining together would ever be possible, for love is nothing other than a spiritual joining together since it is love that brings it about. This love comes from nowhere else than the Lord, for He is the fountain and source of all celestial and spiritual love, and therefore of all good which flows from that love. That love is twofold, celestial and spiritual. Celestial love is love to the Lord, while spiritual love is love to the neighbour and is called charity. These are the kinds of love from which all celestial or spiritual good is derived and which join themselves to truths which are called the truths of faith. For the truths of faith regarded without love are mere sounds devoid of any life; but through love, and so through being joined to the good of love, they receive life. From this it becomes clear that no measure of faith at all exists except with those who have the good of love in them, and that faith exists insofar as love is present.

[3] And since no measure of faith at all exists except with those who have the good of love within them, neither therefore does any confidence or trust exist with them. With people other than those who have love and charity, trust or confidence which is called the trust or confidence of faith is either spurious or else the kind that can exist even with devil-spirits when subject to fear or to anguish, or else to false persuasion resulting from self-love and love of the world. However, even though at the present day faith without the good works of charity has been made the bringer of salvation, people in a remote way still see that the truths of faith have no power to save because those truths are known also by the evil. Therefore they recognize confidence or trust, to which they give the name faith. They call it faith without being aware of what it really is, or that such is possible even with the evil, or that no spiritual confidence exists if it does not flow in by way of the good of love and charity. They are unaware of the fact that such spiritual confidence does not flow in when a person is subject to fear or anguish, or to false persuasion resulting from self-love and love of the world, but when he is in a state of freedom. Nor are they aware that spiritual confidence does not exist in people other than those with whom good has been joined to truths and become deeply rooted during the course of their lives prior to this, and so does not exist in cases of illness, misfortune, danger to life, or when death is at hand. If this confidence or trust which shows itself in a case of compulsion could save a person, then every mortal human being would be saved, for every one is brought with ease to that confidence; indeed there are none to whom the Lord - who desires the salvation of all - would not grant it. But regarding the confidence or trust which is called faith - what it is, the nature of it, and whom it exists with - this must in the Lord's Divine mercy be discussed elsewhere.