10237. 'For washing' means purification from evils and falsities. This is clear from the meaning of 'washing' as purification from evils and falsities, dealt with in 3147, 5954. Since purification from evils and falsities by means of the truths of faith is the subject in the internal sense of the verses that now follow, what the situation is with purification must be stated briefly. By 'washing' purification is meant, by 'water' the truths of faith are meant, and by 'the laver' containing the water the natural is meant; for all spiritual purification is accomplished within the natural. A person possesses an external and an internal; the external is called the natural and also the natural man, while the internal is called the spiritual and also the spiritual man. They are so called because the person's internal exists in the spiritual world, where spirits and angels are, while his external exists in the natural world, where people are. Both of them, the internal and the external, undergo purification; the internal does so in heaven, and the external in the world while the person is living there, thus within the natural which exists in the world.

[2] The reason why purification takes place within the natural at this time is that the truths of faith within the natural are clearly perceptible; for they exist there among known facts or things in the memory which are perceived clearly when they are brought to mind. It is different however with things that are thought about in the internal man. These do not come to be seen plainly while a person is in the world, because the ideas there are spiritual. This explains why purification is accomplished within the natural. The fact that it is accomplished by means of the truths of faith becomes clear from the consideration that those undergoing purification should not merely know what evil and falsity are but also acknowledge them to be such, and then turn away and flee from them. When this is done the person starts to be purified from them. Evils and falsities cannot be so known or acknowledged except within the natural through the truths of faith, for these teach what they are and so make them plain. The person who believes that he is purified from evils and falsities before seeing and acknowledging those present in himself is very much mistaken, see 8388, 8390ff.

[3] The reason for saying that a person may know his own evils and falsities through the truths of faith within the natural, that is, in the external man, but not in the internal, is that the ideas belonging to thought in the internal man are spiritual, and spiritual ideas cannot be grasped within the natural. This is because they are ideas in the understanding which are unconnected with objects such as exist in the material world. Nevertheless these ideas, that is to say, spiritual ones, which belong properly to the internal man, flow into natural ideas, which belong to the external man; they produce and fashion those natural ideas, doing so by means of correspondences. But more about spiritual ideas belonging to the internal man will in the Lord's Divine mercy be told in a description of heaven and of spirits and angels; ¹ for they use spiritual ideas for thinking and also for talking to one another.

10237a. 'And you shall put it between the tent of meeting and the altar' means in order that truth and good may be joined together. This is clear from the meaning of 'between the tent of meeting and the altar' as the joining together of truth and good, dealt with in 10001, 10025. The reason why the laver was to be placed between the tent of meeting and the altar, and why Aaron and his sons were to wash their hands and feet there, was in order that purification of the heart and regeneration, which essentially is the joining together of truth and good, might be represented. For truth and good joined together constitute heaven itself with a person. This also is why heaven is compared in the Word to a marriage. That joining together is accomplished by means of the truths of faith, because these teach people the way to lead their life; and therefore when they lead a life in accord with the truths of faith a joining together of truth and good is accomplished. For then truth is transformed into good through the life they lead. The life of truth is goodness. The same thing is meant by the reference to a person's being regenerated by 'water and the spirit', 'water' being the truth of faith, and 'the spirit' its life.

Regeneration is the joining together of truth and good, see 2063, 3155, 3158, 3607, 4353, 5365, 5376, 8516, 8517, 8772, 10067.

Footnotes:

41. Anything that is man's own has no life in it; and when depicted visually it looks like something hard as a bone and black. But anything that comes from the Lord does contain life. It has that which is spiritual and celestial within it, and when depicted visually it looks human and alive. It is perhaps incredible, but nevertheless absolutely true, that every expression, every idea, and every least thought of an angelic spirit is alive. In even the most detailed areas of his thought there is an affection that comes from the Lord, who is life itself. Consequently all that derives from the Lord has life within it, for it contains faith in Him, and is here meant by 'a living creature'. It then has the outward appearance of a body, meant here by that which is moving, or creeping. To man these matters remain arcana, but since the subject here is the living and moving creature, they ought at least to be mentioned here.