Numbering corresponds to above paragraphs.
1) But I understood the post as doing more than just suggest a model. A shadow is not an interacting "entity" nor is a part of something real, so the model does not help using that analogy. Also cannot agree there is an "entity" when we start talking about the two (or three) physical and spiritual aspects of our nature. We can say that corpse is me but we would mean that in a past tense, as in that is what is physically what is left of what was me. Just as my departed spirit/soul is not me since I am human and that spirit lacks a body. In that sense the departed spirit is simply what currently remains of me until all the dead are raised with new bodies of flesh and bone again. We are creatures created with bodies and souls given us by God, and that is what makes us human as opposed to something else. In this construct of our nature, Whom we got it from and resurrection, we remain human as our resurrected bodies are His doing as well. If we suggest something else creates our new body am unclear how we can claim what is said to be created is equivalent to what God does.
2) Don't get the second paragraph, especially what is claimed after "it follows". Expound or elaborate plz.
3) I think it wrong to look at what is human as an assembly of body and soul, or in the trichotomost view a body, soul and spirit. The body and soul are united as a whole, so one can't point here or there and define a boundry between body and soul. A united body and soul is what a human is by definition. Severe the two at death and we can no longer speak of the soul as if it was a whole human. We could say the immortal existence of the soul is what makes the continuity of a person's existence possible. Which is why we might consider that whatever else we believe the soul to be, it is what makes us identifiable as unique among all humans and what needs to resurrected united with a new body of flesh to affirm what is resurrected is still that human I know as me. God gave a purpose and wrote His law on hearts, which only makes sense to speak of that as part of the soul. Am curious though if you see this third aspect of our nature (spirit) you are distinguishing from the soul(also a spirit) as something that may or may not be present depending on a person's behavior or is it truly something you see as being an aspect of every human's nature?
4) Again manifesting something is creating a physical form that is not in any way mingled or confused with the nature of the individual doing the manifestation. IOW - as soon as one starts talking about a spirit manifestation "as both a body and a soul" then this tells me that "body and soul" said to be manifested does not really belong to the "spirit" that "created" it - that creation is external to the "spirit". Look at this way, by the same reasoning two such "spirits" could create identical (body and soul) and take turns puppeting either one
Our fundamental difference is that I consider it scientifically proven that the soul is a physical reality, and thus cannot be spirit. If the soul is spirit, then you must provide different explanations for Kirlian photography, hauntings documented on tape, the evidence of reincarnation from India established by Ramakrishna Rao, poltergeists, and many other phenomena.
We agree that the soul causes the body to move, but I believe that the spirit is what causes the soul to move, and the soul them moves the body with it.
#2. I took this quote from your post: "In any model of that concept, the manifestation itself is not the spirit or even a part of the spirit." added the idea that body and soul are different, took what is obvious to me, that the soul has physical parts in a higher dimension, reasoned that these physical parts are a manifestation, and this, if accepted, proves there are three parts.
#1. Spirit is the part that returns to God (as in "into thy hands I commend my spirit"). Soul dissolves (actually disorganizes) slowly, since it was, while we were alive, organized energy. Body degenerates into fundamental chemicals. As long as you are alive, the three are united. At creation in Genesis, God molded pieces of earth (and this included gaia, the movement principle of earth) and blew in His breath, making man a "living soul". The breath made the soul move. In fact, in some early interpretations, Adam and Eve did not have a body until after the fall. In resurrection, the spirit will cause new matter to be generated, together with its motion, since the matter will be higher dimensional, and the higher dimensional part is what we call the soul. It is the higher dimensional part that constitutes the soul (and this was called gaia by the Greeks, and symbolized by the dodecahedron in Plato's system in the Timaeus, which Philo abided by in his writings interpreting Genesis.) When Jesus was raised (by His father), the action of the Father sent His spirit back to His dead body, the spirit recalled His soul to His body, and the soul caused the body to move. Because the power to stand again came from His Spirit, not from God's breath, the new body was "improved" as we have been discussing. This is how the second Adam became a life giving spirit, whereas the first had been a living soul.
#3. I agree we should really not separate them. This whole thread is occurring because language has already done so, and we are trying to understand the reality that language seems to be confusing us about. When a person lives habitually in sin (and this is why God has gone to such pains to tell us exactly what sin is, so we can avoid living in it), his soul is conditioned to have a "desire to sin reflex". The spirit is grieved and the connection between the spirit and soul slowly weakens. When this person dies ("in sin" as we say), his grieved spirit has been eternally conditioned not to cause the soul to want God. At resurrection, the disconnect becomes obvious, as the newly re-created person (body/soul/spirit complex) desires to avoid God. This desire is what causes the person to run away from God, and hell is the only place to go. The disconnect between spirit and soul is what causes the experience of fire. (This again is modeled on Plato's/Philo's understanding, as the spirit is made of fire in the ancient view.)
#4 Each spirit creates its own body. Spirits are each different, so bodies are different. But you have a point in this sense: I think clones possess one spirit, and this creates tons of ethical problems, if indeed, cloning can be done.