6400. 'Biting the horse's heels' means false notions received from the lowest natural level. This is clear from the meaning of 'biting' as clinging to and thereby causing harm, and from the meaning of 'the horse's heels' as false notions received from the lowest natural level; for 'the heel' is the lowest and bodily part of the natural, 259, 4938-4952. While 'horse' is the understanding part of the mind, 2761, 2762, 3217, 5321, 6125. 'Horse' here means false notions because the lowest natural level of the understanding, which is that of the senses, is meant. People who are guided by truth but not as yet by good are subject to false notions received from that lowest natural level. This may be recognized from the consideration that truth is not in any light unless good resides with it or exists within it. For good is like a flame radiating light, and when that good meets some truth it not only throws light on it but also draws it into that radiating light, towards itself. People therefore who are guided by truth but not as yet by good are in a kind of gloom and darkness, because truth possesses no light at all of its own, and the light which those people receive from good is as feeble as light which fades away. When such people therefore think and engage in reasoning about truth, and from truth about good, they are like those who see apparitions in the darkness and believe them to be real bodies. Or they are like people who in the gloom see streaks on a wall and whose imagination leads them to make some shape out of them, either of a human being or of some other living creature. But when daylight comes it is seen that they are merely streaks without any such shape. It is much the same with the truths residing with them; for they see as truths what are not truths, which ought rather to be likened to apparitions or streaks on the wall. What is more, people of this kind - those who have been guided by some truth from the Word but not by any good - have been the source of all the heresies that have arisen within the Church; for heretical belief has been seen by them to be altogether the truth. So too with falsities within the Church. Those who have disseminated them have not been guided by good, as may be recognized from the consideration that they cast the good of charity far behind the truth of faith and as a consequence have for the most part invented ideas which are in no way compatible with the good of charity.

[2] Since it is said that those who are guided by truth but not as yet by good use false notions received from the lowest natural level to reason about truth and about good, let something also be said about what false notions are. Take for example a person's life after death. People subject to false notions received from lowest nature, such as those who are guided by truth but not as yet by good, do not believe that any part of a person except his body has life, or that a person can possibly rise again when he dies unless he gets back his body. If these people are told that the interior man is the one who has life within the body and who is raised up by the Lord when the body dies, and that this interior man has a body like those that spirits or angels have, and that like a person in the world he can see, hear, talk, mix with others, and seem to himself to be altogether a person, they cannot grasp any of it. False notions received from the lowest natural level cause them to believe that such things cannot be true.

[3] The chief reason why they do not believe them to be true is that they cannot see those things with their physical eyes. When such people think about the spirit or soul, the only idea they can have of it is that it is like things the eye cannot see in the natural world. Consequently they consider it to be either something breath-like, or else something air-like, ether-like, or flame-like, or - according to some - something purely thought-like, which possesses scarcely any vitality until it is joined again to the body. These people think the way they do because to them everything of an interior nature is gloom and darkness and only those of an external nature are in light. This shows how easily such people can fall into error; for if they limit their thought to the body and how it will be reassembled, to the destruction of the world and the fact that it has been awaited in vain for so many centuries, to animals and the fact that they have life not unlike man's life, or to the fact that no dead persons reappear and declare their state of life, they easily recede - when they think of these and other such things - from belief in resurrection, as they do from many other matters of belief. The reason they recede from that belief is that they are not guided by good and do not through good see in the light. Such being their condition it also says, 'And its rider will fall backwards; I wait for Your salvation, O Jehovah', meaning a receding from [the truth] unless the Lord comes to their aid.

5084. 'Of the house of the chief of the attendants' means the things that are first and foremost in explanations. This is clear from the meaning of 'the chief of the attendants' as the things which are first and foremost in explanations, dealt with in 4790, 4966. The meaning here therefore is that both kinds of sensory impressions were cast aside by the things which are first and foremost in explanations, that is to say, by those which belong to the Word in the internal sense. Sensory impressions are said to be cast aside when the things that are first and foremost in explanations place no reliance on them; for they are indeed sensory impressions, and impressions received by the mind directly through the senses are illusions. The senses are the source of all the illusions that reign in a person, and they are the reason why few have any belief in the truths of faith and why the natural man is opposed to the spiritual man, that is, the external man to the internal. Consequently if the natural or external man starts to have dominion over the spiritual or internal man, no belief at all in matters of faith exists any longer, for illusions cast a shadow over them and evil desires smother them.

[2] Few know what the illusions of the senses are and few believe that these cast a shadow over rational insights and most of all over spiritual matters of faith - a shadow so dark that it blots them out. This happens especially when at the same time what a person delights in is the result of desires bred by a selfish and worldly love. But let examples be used to shed some light on this matter, first some examples of illusions of the senses which are purely natural ones, that is, illusions about things within the natural creation, then some examples of such illusions in spiritual things.

I. It is an illusion of the senses - a purely natural one, or an illusion about the natural creation - to believe that the sun is borne round this globe once a day, and that the sky too and all the stars are borne round at the same time. People may be told that it is impossible and therefore inconceivable that so vast an ocean of fire as the sun, and not only the sun but also the countless stars, should revolve once a day without undergoing any changes of position in relation to one another. They may be told in addition that one can see from the planetary system that our own globe performs a daily movement and an annual one, by rotations on its axis and by revolutions. This can be recognized from the fact that the planets are globes like ours, some of which have moons around them and all of which, as observation shows, perform daily and annual movements like ours. But for all that they are told, the illusion the senses prevails with very many people - that things really are as the eye sees them.

[3] II. It is an illusion of the senses - a purely natural one, or an illusion about the natural creation - that the atmosphere is a single entity, except that it becomes gradually and increasingly rarified until a vacuum exists where the atmosphere comes to an end. A person's external senses tell him nothing else than this when their evidence alone is relied on.

III. It is an illusion of the senses, a purely natural one, that the power which seeds have to grow into trees and flowers and to reproduce themselves was conferred on them when creation first began, and that that initial conferment is what causes everything to come into being and remain in being. People may be told that nothing can remain in being unless it is constantly being brought into being, in keeping with the law that continuance in being involves a constant coming into being, and with another law that anything that has no connection with something prior to itself ceases to have any existence. But though they are told all this, their bodily senses and their thought that is reliant on their senses, cannot take it in. Nor can they see that every single thing is kept in being, even as it was brought into being, through an influx from the spiritual world, that is, from the Divine coming through the spiritual world.

[4] IV. This gives rise to another illusion of the senses, a purely natural one, that single entities exist called monads and atoms. For the natural man believes that anything comprehended by his external senses is a single entity or else nothing at all.

V. It is an illusion of the senses, a purely natural one, that everything is part of and begins in the natural creation, though there are indeed purer and more inward aspects of the natural creation that are beyond the range of human understanding. But if anyone says that a spiritual or celestial dimension exists within or above the natural creation, this idea is rejected; for the belief is that unless a thing is natural it has no existence.

VI. It is an illusion of the senses that only the body possesses life and that when it dies that life perishes. The senses have no conception at all of an internal man present within each part of the external man, nor any conception that this internal man resides in the inward dimension of the natural creation, in the spiritual world. Nor consequently, since they have no conception of it, do the senses believe that a person will live after death, apart from being clothed with the body once again, 5078, 5079.

[5] VII. This gives rise to the further illusion of the senses that no human being can have a life after death any more than animals do, for the reason that the life of an animal is much the same as that of a human being, the only difference being that man is a more perfect kind of living creature. The senses - that is, the person who relies on his senses to think with and form conclusions - have no conception of the human being as one who is superior to animals or who possesses a life superior to theirs because of his ability to think not only about the causes of things but also about what is Divine. The human being also has the ability to be joined through faith and love to the Divine, as well as to receive an influx from Him and to make what flows in his own. Thus because of his response to such influx from the Divine it is possible for the human being to receive it, which is not at all the case with animals.

[6] VIII. This gives rise to yet another illusion, which is that what is actually living in the human being - what is called the soul - is merely something air-like or flame-like which is dispersed when the person dies. Added to this is the illusion that the soul is situated either in the heart, or in the brain, or in some other part of him, from where it controls the body as if this were a machine. One who relies on his senses has no conception of an internal man present in every part of his external man, no conception that the eye sees not of its own accord, and that the ear hears not of its own accord, but under the direction of the internal man.

IX. It is an illusion of the senses that no other source of light is possible than the sun or else material fire, and that no other source of heat than these is possible. The senses have no conception of the existence of a light that holds intelligence within it, or of a heat that holds heavenly love within it, or that all angels are bathed in that light and heat.

X. It is an illusion of the senses when a person believes that he lives independently, that is, that an underived life is present within him; for this is what the situation seems to be to the senses. The senses have no conception at all that the Divine alone is one whose life is underived, thus that there is but one actual life, and that anything in the world that has life is merely a form receiving it, see 1954, 2706, 2886-2889, 2893, 3001, 3318, 3337, 3338, 3484, 3742, 3743, 4151, 4249, 4318-4320, 4417, 4523, 4524, 4882.

[7] XI. The person who relies on his senses can be misled into a belief that adulterous relationships are allowable; for his senses lead him to think that marriages exist merely for the sake of order which the upbringing of children necessitates, and that provided this order is not destroyed it makes no difference who fathers the children. He can also be misled into thinking that the married state is no different from having sex with someone, except that it is allowable. That being so, he also believes that it would not be contrary to order for him to many several wives if the Christian world, basing its ideas on the Sacred Scriptures, did not forbid it. If told that a correspondence exists between the heavenly marriage and marriages on earth, and that no one can have anything of marriage within him unless spiritual good and truth are present there, also that a genuinely conjugial relationship cannot possibly exist between one man and several wives, and consequently that marriages are intrinsically holy, the person who relies on his senses rejects all this as worthless.

[8] XII. It is an illusion of the senses that the Lord's kingdom, or heaven, is like an earthly kingdom, that joy and happiness there consist in one person holding a higher position than another and as a consequence possessing more glory than another. For the senses have no conception at all of what is implied by the idea that the least is the greatest and the last is the first. If such people are told that joy in heaven or among angels consists in serving the welfare of others without any thought of merit or reward, it strikes them as a sorrowful existence.

XIII. It is an illusion of the senses that good works earn merit and that to do good to someone even for a selfish reason is a good work.

XIV. It is also an illusion of the senses that a person is saved by faith alone, and that faith may exist with someone who has no charity, as well as that faith, not life, is what remains after death. One could go on with very many other illusions of the senses; for when a person is governed by his senses the rational degree within him, which is enlightened by the Divine, does not see anything. It dwells in thickest darkness, in which case every conclusion based on sensory evidence is thought to be a rational one.