The functional structure of the brain could be categorized in three parts primal (adi) brain, middle (madhya) brain and present (vartmana) brain. The first one may be regarded as the root, the middle one as stem and the third as the branches along with leafs and flowers of the tree of brain functions. The primal brain is endowed with all the knowledge, tendencies and impressions assimilated since the origin of the jivatma (soul) till its birth in the present life. The term middle brain refers to the source of manifestation of latent or supernormal powers. The present brain, as the name suggests, is developed according to the memories, knowledge and conditioning resulted from the bio-electrical processes and the perceptions made through exposure to the world, experiences, education, social encounters etc since the embryonic state till the present time. The three brains are functionally organized one under the other like the layered skin of an onion. The primal brain lies in the innermost core. It is the subtlest but the most prominent of all. It is the original source of consciousness for the development and activation of the other two. The blueprint of the inner character of an individual is stored here. In essence, the seed of ones personality sprouts from this center. The number of neurons in a human brain is almost double the human population existing on the earth today. If one second is spent in counting one neuron, it will take 300 centuries to sort all of them in a single brain! These tiny nerve cells have negligible size and weight but each of them could be compared with a complete human being in terms of work potential and highly evolved structure. If the entire human population could be disciplined and motivated to follow righteous path, the world would soon become more beautiful and happier than what could be imagined of the heavens. If all the neurons could be conditioned to function optimally making best use of their latent collective powers, the human brain would certainly manifest divine potentials and supernatural talents.... Because of individual egos and diversities of characters, it may not be possible to control the over 6000 millions of the people inhabiting the earth. However, the population of 10,000 million neurons in ones own brain could be regulated and gradually conditioned for sublime transformations by a person who has a balanced mind and pure and eminent character and who endeavors to excel his mental potentials with strong will and perseverance. Such endeavors are as difficult, important and glorifying as those of becoming an unchallenged emperor of the entire globe. Until the last century, extraordinary intelligence and talents were generally attributed to ones good fortune or divine blessings... Scientific investigations into brain-functions and human psychology have now revealed that such fortunes and acumen could be awaken to a great extent by systematic training and endeavors because the brain of every human is endowed with enormous potentials.

- courtesy Akhand Jyoti