Here's some more interesting stuff from Seth Speaks, by Jane Roberts. All of these excerpts are from Chapter 10.
Seth on our physical reality:
It is as if your present situation and all its physical phenomena were projected from within yourself outward, giving you a continuous running a motion picture, forcing you to perceive only those images that were being transposed. These seem so real that you find yourself in the position of reacting to them constantly…
They serve to mask other quite valid realities that exist at the same time, however, and actually from these other realities you gain the power and the knowledge to operate the material projections…
The inner senses are equipped to perceive data that is not physical. They are not deceived by the images that you project in three-dimensional reality…
Anything of which you are aware in three-dimensional existence is only a projection of a greater reality into that dimension.
This matches up pretty well with the ideas of N-space and M-space that we've discussed earlier. Of course, the fact that the Seth material – or some of it – can be understood in terms roughly equivalent to the N-space idea doesn't mean that the N-space idea is correct. But it is at least intriguing to note the parallels.
Seth on apparitions:
I have explained to some degree the way images are constructed out of an available field of energy. You perceive only your own constructions. If a "ghost" wants to contact you, therefore, he can do so through telepathy, and you can yourself construct the corresponding image if you desire. Or the individual might send you a thought-form at the same time that he telepathically communicates with you.
In our terms, the apparition's form is rendered in the M-space of the particular individual. Two or more individuals may render the equivalent form, each in his or her own subjective M-space. Another individual, whose consciousness is not telepathically in tune with that of the consciousness behind the apparition, may not render the apparition's form in his M-space at all.
This might account for cases where two or three people see an apparition, while a fourth person in the room with them sees nothing. It might also account for the peculiar fact that an apparition (contrary to most movie ghosts) usually appears just as solid and three-dimensional as any other physical object, and is seen from the appropriate perspective by each observer– that is, one observer may view the apparition head-on, while an observer who is standing off on the side will see the apparition in profile. Light and shadow are also rendered appropriately.
All of this is about what we would expect if the apparition is modeled in M-space like any other "real" thing. But since the rules (in the N-space program) governing the apparition are different from those governing other objects, the apparition can appear and vanish instantaneously, walk through walls, etc.
Seth has some interesting things to say about the experience of souls when they are between incarnations. Much of this dovetails nicely with the purported "between-lives memories" recovered by hypnotherapist Michael Newton and discussed in books like Journey of Souls. Note that Newton's books came out considerably later than the Seth books.
In discussing the planning stage of the soul's next incarnation, Seth says:
Now in this time of choosing all of these matters are considered, and suitable preparations made, but the planning itself is all a part of experience and of development. The in-between existence, therefore, is every bit as important as the period that is chosen. You learn to plan your existences, in other words. You also make friends and acquaintances in these rest periods who you meet again and again – and only, perhaps, during in-between existences…
This agrees very well with Michael Newton's books, in which reunions between souls are enacted by his patients with considerable displays of emotion. His deeply hypnotized subjects often are reduced to tears as they "meet" their between-lives friends (or soul mates), who seem to be part of a closely intertwined group soul. The need to plan the next incarnation is also stressed by patients in Newton's hypnosis sessions.
Seth says that an individual can choose to relive parts of his earthly life with different scenarios, in order to learn from alternative versions of his life. In these experiments the individual creates thought-forms of people to interact with. Seth says:
He is told the nature of those who participate with him. He realizes they are thought-forms, for example, and his own; but again, thought-forms do possess a certain reality and consciousness. They are not cardboard actors for him to simply push around at will. He must, therefore, take them into consideration, and he has a certain responsibility toward them.
They will grow in consciousness and continue their own lines of development on different levels. In one way, we are all thought-forms…
Again, I find this interesting in respect to Michael Newton's work. I recall a passage in one of his books – probably the first one – in which a patient is remembering a past life as a woman. Though I don't have the reference handy, the patient, while hypnotized, says something like, "The incarnation was useful to me, and I believe it was good for her, also." This always puzzled me, since it seemed to imply that the soul was somehow different from the human being who served as the soul's vehicle. It is, however, perhaps more understandable if we view the human being as a thought-form projected by the soul, which nevertheless has a degree of autonomy – an ever-increasing autonomy, inasmuch as the thought-form grows and develops on its own, eventually establishing independence. Whether or not there is any truth in this, I can't say; but it's an intriguing notion, perhaps worth exploring further.
A common objection to reincarnation is that many mediumistic reports make no mention of it. Seth addresses this problem:
The in-between period itself, however, has many dimensions of activity and divisions of experience. As you can see, to put it as simply as possible, everyone does not "know" everyone else.
Instead of countries or physical divisions, you have psychological states. To an individual in one, another might seem quite foreign. In many communications with those in these transitional states, messages through mediums can appear as highly contradictory. The experience of the "dead" is not the same. The conditions and situations vary. An individual explaining his reality can only explain what he knows. Again, such material often offends the intellect that demands simple, neat answers and descriptions that tally.
Most individuals from these stages who communicate with "living" relatives have not reached the time of choosing as yet, and have not completed their training.
They may still be perceiving reality in terms of their old beliefs. Almost all communications come from this level, particularly when there is a bond of relationship in an immediately previous life.
So it could simply be the case that many mediumistic reports are made by spirits who have not yet progressed to the training stage of their experience. Newton's patients seem to go directly to this experience, bypassing the earlier stages. This may be because Newton's deep hypnosis is accessing the higher self, rather than the incarnational self.
Of course, it's also possible that "between-lives" accounts recovered by hypnosis are simply confabulations. The tendency of the mind to confabulate – to make things up – while hypnotized is well established. Personally, I find the accounts presented in Newton's books pretty compelling, but I admit that my reaction is subjective and that little in the way of objective, testable evidence is provided.
Before signing off on this post, I want to mention a relevant web essay to which I was directed by a Facebook friend. Although the linked essay doesn't entirely align with my own speculations, there's a large degree of overlap. Moreover, the quotations from a different Seth book that appear at the end of the essay are very well chosen.