I’d like to put forward an argument for the existence of an etheric body, as well as the concept
of life energy (prana), which is tightly linked to it. This argument is largely
the result of my own reflections and, as such, carries a certain amount of originality.
On its own, it might fall into the category of a Gedanken experiment,
though because of how accessible it is, it's almost tangible and practically doable,
so anyone could essentially "run" it.
To understand the argument, I think it makes sense to briefly recap
the line of reasoning that led to a discovery which is now considered
an established scientific fact. That’s because the argument
in favor of an etheric body closely follows the same logic that led to said discovery.
We're talking about the discovery of the neutrino/antineutrino, which originally came about through theoretical speculation. So, the story goes like this...
There is a physical process in nature called beta decay.
It involves a type of radiation that occurs when a
neutron in an element's nucleus transforms into a single proton
while simultaneously emitting an electron (a beta particle) and an (electron)
antineutrino. During this, the radiating element keeps the same mass number (the sum
of protons and neutrons), but its atomic number increases by one.


However, the crucial thing here is that in the late 1920s and early 1930s,
neutrinos—or rather, antineutrinos—were not known particles, and the entire process of
beta decay faced a massive theoretical problem.
The issue was that the total energy, the total momentum,
and the total angular momentum of the system before and after the reaction
simply didn't match. In other words, some of the fundamental laws of nature (physics)
were being broken.
To solve this problem theoretically, in 1930, Pauli was faced with two possibilities:
i) either conclude that there are processes in nature where the fundamental laws
of physics are actually violated,
ii) or, to maintain the validity of certain fundamental laws of nature (like
the conservation of energy and momentum), propose—or rather
postulate—the existence of a new, previously unknown particle that would
take on exactly the amount of energy and momentum required so that
the laws of conservation would hold true for the beta decay process.
Not wanting to give up on the fundamental laws of nature, Pauli went with option ii)
and assumed there might be a new type of particle (neutrinos)
that hadn't belonged to this side of reality yet
(they were about as real as a tooth fairy's gold coins😁)
And he wasn't wrong.
In 1956, Clyde Cowan, Frederick Reines, F. B. Harrison, H. W. Kruse
and A. d. McGuire detected the neutrino, for which they were awarded the Nobel Prize 40 years later,
in 1995.