"The culture of the ancient Orient affirmed not only ideas of man's dependence on the supernatural forces that were external to him; there was also a tendency to cultivate certain rules of behaviour in relation to these forces, including techniques of training the body in relation to these forces to regulate and perfect bodily and spiritual processes. Various systems of exercises linked with religious beliefs were evolved to change the state of the mind, the consciousness, to achieve complete unity with the universe, to become one with the energy of nature. These techniques for influencing one's own organism through the mechanisms of psycho-physiological self-regulation and control - techniques that are much in fashion today - could not have survived for centuries and have penetrated other cultures with a different ethnos, if they had not contained some real knowledge of the most subtle and hidden structural."