7918. 'And you shall take a bunch of hyssop' means the outward means by which purification is effected. This is clear from the meaning of 'hyssop' as outward truth, the means by which purification is effected, dealt with below. It says that they were to take a bunch of hyssop because 'a bunch' is used to refer to truths and the arrangement of them, 5530, 5881, 7408. The reason why 'hyssop' means outward truth, the means of purification, is that all spiritual purification is effected by means of truths. For the earthly and worldly types of love from which a person has to be purified are not recognized except by means of truths. When these truths are instilled by the Lord a horror of those types of love, as of things unclean and damnable, is also at the same time instilled. The effect this horror has is that when something similar enters the person's thinking the feeling of horror returns, producing a loathing of those types of love. That is how a person is purified by truths, which serve as outward means. This was the reason why it was laid down that knives or 'small swords' made of flint should be used when circumcision took place, 'small swords' or knives made of flint being the truths of faith by means of which purification is effected, see 2799, 7044, and 'circumcision purification from filthy types of love, 2039, 2632, 3412, 3413, 4461, 7045.

[2] Since 'hyssop' had that meaning it was used in cleansings, which in the internal sense meant purifications from falsities and evils, as in the cleansing of leprosy in Moses,

The priest shall take for cleansing a leper two living clean birds, and cedarwood, and scarlet, and hyssop; and he shall dip them in the blood of the slaughtered bird, and sprinkle over the one to be cleansed. Leviticus 14:4-7.

Hyssop was likewise used in the cleansing of the house, if leprosy was in it, Leviticus 14:49-51. The preparation of the water of separation by which cleansings were accomplished also involved the use of cedarwood and hyssop, Numbers 19:6, 18. 'Cedarwood' meant inward spiritual truth, whereas 'hyssop' meant outward [spiritual] truth. Thus 'cedarwood' is the means effecting purification more internally, 'hyssop' the means effecting it more externally. That 'hyssop' is a means of purification is plainly evident in David,

You will purge me with hyssop and I shall become clean; You will wash me and I shall be made whiter than snow. Psalms 51:7.

'Purging with hyssop and becoming clean' stands for external purification, 'washing and being made whiter than snow' for internal purification, 'snow' and 'whiteness' having reference to truth, 3301, 3993, 4007, 5319. 'Hyssop' means a very low kind of truth and 'cedar' a superior kind of truth, as is evident from the following words in the first Book of Kings, Solomon spoke about trees, from the cedar which is in Lebanon even to the hyssop which comes out of the wall. 1 Kings 4:33.

Here 'the cedar' stands for the internal kind of truth and 'hyssop' for the external kind of truth that belong to intelligence.

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.