By definition, a chemical is a form of matter with a constant chemical composition, in terms of molecules and atoms (bound by chemical bonds). Particle physics deals with subatomic objects, amongst other those responsible for chemical bonding, or other matter properties.

Dear Abhijit et all, 

According to ”Matthew 6:22-23:"Situated at the anatomical center of our brain lies a mysterious gland that may be the intermediary gate that bridges our physical and spiritual experiences here on Earth. Seventeenth-Century French philosopher Rene Descartes coined this organ, called the pineal gland, as the “seat of the soul”, as he believed it provided people with a medium from which our soul could be expressed through our physicality. The pineal gland has been a topic of great debate over the past couple of decades as the science community is still trying to discover its complete biological function. Dr. Rick Strassman, M.D., author of DMT: The Spirit Molecule, has dedicated years of research to the pineal gland as he suggests that this gland is the factory for a powerful brain chemical called DMT (Di-Methyl Tryptamine) which when produced induces a person into a psychedelic and mystical experience.  Many different cultures talk about our “third eye,” and modern theories suggest that this may be a reference to the pineal. Even more peculiar is the fact that pineal gland symbology can be traced to many civilizations such as the Romans, Mexicans, Egyptians, Babylonians and the Greeks. It is interesting to note that even the Catholic Church displays pineal gland imagery, as the Vatican Square contains the largest pineal-like statue in the world. So what could all of this mean? Is there ancient knowledge of this gland that previous cultures had access to? Furthermore, what role does the pineal gland play in our spiritual experiences and how can we explain this in physiological terms?

One of the earliest accounts of the pineal gland is in the writings of a third-century B.C. Greek physician named Herophilus, where he discusses the piniform or pinecone shaped organ as being the size of our pinkie fingernail. The name comes from the Latin word pinea, which literally means “pinecone.” As mentioned previously, the gland sits at the approximate geometric center of the brains mass. Additionally, the gland is not technically part of the brain, as it is not protected by the blood-brain barrier.  In his book DMT: The Spirit Molecule, Dr. Rick Strassman discusses the glands unique solitary status within the brain,

“[…] All other brain sites are paired, meaning that they have left and right counterparts; for example, there are left and right frontal lobes and left and right temporal lobes. As the only unpaired organ deep within the brain, the pineal gland remained an anatomical curiosity for nearly two thousand years. No one in the west had any idea what its function was.”

Additionally, the pineal gland sits close to the sensory and emotional centers of the brain, which could explain why spiritual experiences can evoke so much emotion and sensation. In the 17th century Rene Descartes was searching for the source of our thoughts, and proposed that the solitary pineal organ could be the generator. Descartes was interested in the location of the pineal in relation to the cerebrospinal fluid byways, and suggested that when the pineal gland “secreted our thoughts” that they moved through the cerebrospinal fluid to make its way to the rest of the brain.

David Wilcock’s New York Times bestseller  The Source Field Investigations discusses the idea that our pineal gland is our “third eye” which provides us with visuals during psychedelic and near death experiences (NDE), and also while we dream, finding biological evidence to support this claim,

“[…] it is apparent that several relationships exist between the pineal gland and retina. The similarities in development and morphology have been obvious for many years…. Although the mammalian pineal gland is considered to be only indirectly photosensitive, the presence of proteins in the pineal which are normally involved in photo-transduction [light sensing] in the retina, raises the possibility that direct photic events may occur in the mammalian pineal gland…”

Have a nice time

Helena

Dear Abhijit,

there is a missing link between brain and soul. This body-mind problem is not solved and possibly never will be solved. Sri Nisargadatta Maharaj says "I am only the Self". Does he mean without brain?

The Bhagavad-Gita describes some of the qualities of the soul:

I say to thee weapons reach not the Life;

Flame burns it not, waters cannot o’erwhelm,

Nor dry winds wither it. Impenetrable,

Unentered, unassailed, unharmed, untouched,

Immortal, all-arriving, stable, sure,

Invisible, ineffable, by word

And thought uncompassed, ever all itself,

Thus is the Soul declared!

(Arnold, 1900)

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3115284/

Agree with Napoleon and Prof. Subhash's views. Both are different in their respective position. Yes, now some researches are going on to link the relation between soul and brain.