Sanskrit: The Human Body's Eternal Song

Close your eyes for a moment and just listen.
What did you hear? Even when we are in a "quite" environment, so many sounds bombard our ears; the dull drone of machines, distant voice carried on the wind, birdsongs, telephones, construction noises, traffic … . It seems impossible to escape external noise in this modern world.
But if we can withdraw our minds from these external sounds, we will hear much subtler, inner vibration. In the absolute stillness of soundproof chambers in scientific laboratories, insulated from all external noise, some people have been able to hear some of these internal sounds: a high-pitched resonance, and a deep throbbing - the vibration of their own nervous system, and the pulsing of their blood.
Thousands of years ago, yogis meditating in the utter silence of caves or mountains, were able to withdraw their minds not only from external sounds, but from the noises of the physical body as well. They could then focus their minds on centers of subtle energy inside them. Along the spine and in the brain, there are seven psychic energy centers or Chakras' which control the functioning of mind and body. Most human beings are unaware of these Chakras, but when the mind and body become more refined through meditation, these subtle energy centers can be perceived and controlled.
The Chakras have been described by enlightened saints and mystics of all spiritual paths and cultures - by Buddhists ancient Chinese, Hindus, Tantriks, Christian and Jewish mystics, Sufis, and Native American Indians. Recently, science has detected them as well. Sensitive instruments have measured energy emanations (beyond frequencies are known to come from biochemical, anatomic systems), surging from the surface of the body at the exact locations of the Chakras'.
Those ancient yogis, who directed their inner ear towards these energy centers, were able to hear the subtle vibration in all. Then they spoke them aloud, and each of these subtle inner sounds became one letter of the Sanskrit alphabet.
Thus, the Sanskrit language - sometimes called "the mother of all languages" - was developed from the externalized sounds of our subtle internal energies. It is the human body's eternal song.