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to the brain every second. These messages are the raw materials--the unprocessed input-of awareness. How the brain processes these raw sensations, interpreting them in the light of mood, expectations, and many other variations, is known as perception. A familiar illustration of the distinction between sensation and perception is pain. The same sensation signals (from say, a tooth-ache) for example, affects each person differently. His suffering is perception. The process by which the mind converts raw sensations into percepton is complicated. While the sensation varies according to the power of the stimuli, perception varies by an infinity of factors, some within the body and the others without. The state of emotions, in particular, may have a profound and at times decisive effect. .
In the process of Sharira-Preksha, the mind's eye is focussed on the internal complex of activities. Preksha of physiological functions assists each cell to revitalise itself, facilitates digestive process and improves circulation and quality of blood. With our imperfect and fragmental knowledge, it is not possible to directly cognise the permanent substratum of conciousness but the perception of its modes through chemical and biological changes allows us to experience it. Preksha of everchanging biological transformations in the body, is, thus, a method of experiencing—pure consciousness--the substratum-through its modes. Meditation aims to change perception in such a way that the mind can transcend the limitation of the physical brain. William James, the psychologist, says. "Our normal waking alertness is but one special type of consciousness, whilst all about it, parted from it by the flimsiest of screens, there lie many potential forms of consciousness entirely different.” Preksha leads to what lies beyond the normal waking alertness (conscious mind). Chaitanya Kendra Preksha (Perception of Psychic Centres)
So far we had believed that the brain was the source of energy & the place from which the will acted; but now, with
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