7408. 'And they gathered them into heaps [upon] heaps' means that those false reasonings were arranged into bundles in the natural. This is clear from the meaning of 'being gathered into heaps [upon] heaps' as being arranged into bundles. Those reasonings are 'gathered into heaps' because all the contents of a person's mind have been arranged into series, and into bundles so to speak, and then into series within series, or bundles within bundles, see 5339, 5530, 5881. The fact that they are arranged in this kind of way is evident from the way that all things are arranged within the body. There fibres can be seen arranged into bundles, and glands into clusters. This arrangement exists everywhere within the body, and in a much more perfect manner with the more refined substances that are not visible to the naked eye. That bundling allows itself to be seen especially in the brain, in the two substances there, one of which is called cortical, the other medullary; and it exists no less with those more refined substances, and lastly the most refined, where the forms that receive them are the actual forms receptive of life.

[2] The fact that forms or substances are receptive of life may be recognized from every detail to be observed in living things. It may also be recognized that recipient forms or substances are arranged or structured in the most appropriate way for the inflow of life. If life were not received by substances, that is, forms, there could be no living thing in the natural world, nor any in the spiritual world. Series of extremely fine threads, resembling bundles, are what constitute those forms. They likewise are receptive of life, and within those forms undergo perfect modification. For modifications depend on the forms, that is, substances, in which they occur and from which they arise; for the substances or forms determine what the modifications shall be. The reason why the learned have come to envisage the things that constitute a person's life - the contents of his thought and will, for example - as entities without recipient substances or forms is that they have come to believe that life or the soul is either something flame-like or something air-like, and so the kind of thing that will be dispersed after death. This accounts for the insane notion of a large number of them that there is no life after death. From all this one may see how to understand the explanation that the false reasonings were arranged into bundles in the natural.