Note: The following article is published with permission.

On the Forbidden Letters - Daniel Witzen

Part 1 - On magnetite      

"In the human brain, pyramidal cells are present and arranged in layers in the cortex of the two cerebra."[H. Coetzee, Ph.D.]

 
                               
 [ Brain Magnetite ]

Many people ask themselves, why did Egypt's pyramids have the shape of a pentahedron? And was the first pentahedron designed by an Egyptian, or did Egypt look at mother nature for the pyramidal shape? Because both the pentahedron and the double pentahedron, the octahedron, exist in nature: as lodestone.
 
Lodestone is found in most parts of the world, usually in the form of magnetite (Fe₃O₄). It is the only natural magnet on earth:

 [ Magnetite ]

Either way, designed by man, or copied from the shape of magnetite, the pyramid represents the microcosmic Ben-ben Stone, also known as the Grailstone or Philosopher's Stone: the agent to the alchemical fire of kundalini in the human body. Hence pyramid, meaning: 'fire in the middle,' or 'fire in there.'
 
Now, the Paris 4 say that that stone is 'pointy.' And this could then imply a penta-, or octahedron. This possibility is all the more gripping, since magnetite is also found in the human brain and the Stone of Transmutation conceivably produced of that brain. 'First the head is decapitated, then the Stone is produced.'[The Paris 4] (The ancient alchemists of Greece even called that stone the lithos egkefalos, meaning: brain-stone / Jung, MC, pars 626.)
 
John Raven, commenting on the Forbidden Letters, also conjectured that it's 'a possibility that the Stone is produced of the old microcosmic head And that the head placed back after the Kundalini-fire is again that Stone. This would mean that there are as many Grails as there are human heads.'[Raven]
 
Animals too possess biogenic magnetite and it is believed that this helps them to detect the earth's magnetic field. In the human body, to be complete, magnetite is found in

• a) the cerebral cortex,
• b) the cerebellum, and
• c) in meninges (membranes surrounding the brain and spinal cord).

In other words: in the Tree of Life.

Part 2 - On the Alchemical Embryo of Immortality     

In his 1962 book Patanjali and Yoga Mircea Eliade tells us that, according to Chinese alchemy, 'the tan-t'ien, the 'fields of cinnabar,' are to be found in the most secret recesses of the brain and belly; here it is that the embryo of immortality is alchemically prepared.' [Eliade, 1962:111] This is strange, because only parts of the Tree of Life and it's cakra's are located in the brain and belly. The root-, heart-, and throat-cakra for instance are not. So what is preparing that embryo of immortality that brain and belly are involved? Do the brain and belly have something in common for instance? The answer is yes: braincells. Because it was discovered 'that both our gut and our brain originate early in embryogenesis from the same clump of tissue which divides during fetal development. While one section turns into the central nervous system, another piece migrates to become the enteric nervous system. Later the two nervous systems connect via a cable called the vagus nerve -- the longest of all the cranial nerves whose name is derived from Latin, meaning "wandering." The vagus nerve meanders from the brain stem through the neck and finally ends up in the abdomen.There's the brain-gut connection.'[J.S. Rubin]
 
The gut's brain, or second brain, known as the enteric nervous system (ENS), 'is located in sheaths of tissue lining the esophagus, stomach, small intestine and colon.'[Ibid.]
 
Dr. Michael Gershon, a professor of anatomy and cell biology at Columbia-Presbyterian Medical Center in New York City, dubs 'the entire gastrointestinal system the body's second nervous system. "The brain is not the only place in the body that's full of neurotransmitters," says Dr. Gershon. "A hundred million neurotransmitters line the length of the gut, approximately the same number that is found in the brain." - '[Ibid.]
 
If we then 'add the nerve cells of the esophagus, stomach and large intestine, there are more nerve cells in the gut than there are in the entire remainder of the peripheral nervous system. Nearly every chemical that controls the brain in the head has been identified in the gut, including hormones and neurotransmitters.'[Ibid.]
 
This all could mean that the ancient alchemists already new about the gut-brain. Just like they new about biophotons, before these photons were 'discovered' by scientists in 1938. From the Pedro Caz-article on the Forbidden Letters at World Mysteries:

[ Biophoton-image (left) of the human hand ]

'That cells emitted light was first suggested in 1938 by the Russian biologist Alexander Gurwitsj. 'Every living system emits, absorbs, and stores light, (...) and every living cell emits at least 100.000 light particles per second.'[Boswinkel] Untill today though 'nobody knows how biophotons are being produced. A thing that seems certain is that they are messengers or bosons. They carry information.'[Boswinkel]'[Richard Morley at http://www.world-mysteries.com/PhilipGardiner/forbidden_letters_24.htm  ]
 
'The "refracted rays of the Divine in the world and in created things (Caussin)" correspond to the "certain luminosity" which the alchemists said was inherent in the natural world.'[Jung, MC, par. 344/emphasis added]