The conscious mind presides over the voluntary functions ; it corresponds to the functions of the gray matter, the motor area of the brain, the higher intellectual faculties; but in the presence of a stronger personality, be it an attorney at law, a minister, a teacher, a salesman, or a physician, it is amenable to influence and is controlled by suggestion.
Our higher mental functions seem to have their immediate seats in the cortex of the brain , and of these mental functions the anterior frontal lobes appear to have the power of inhibition. This is as near as we can come to absolute localization of the mental faculties .
Articulation is a motor act, and, in common with other motor functions, is governed by groups of cells in Broca's convolutions; but the mind , which is symbolized by language, giving expression to our thoughts, desires, ideas, aspirations and volitions, is a psychic phenomenon dependent upon the entire brain and nervous system .
The subconscious mind, which corresponds to the functions of the vegetative brain and nervous system , perceives by intuition; it is the storehouse of subjective memory, and is greatly influenced by the emotions.
It presides over the functions, conditions, and sensations of the body;
Over all the vegetative or nutritive processes - over digestion, secretion, excretion, nutrition, waste, respiration, calorification;
In short, over all cell life function and development.
Whatever impulse dominates the individual - whether fear, worry, anxiety, envy, anger, jealousy, love, or the purely animal passions - makes its appeal to and impress on the subconscious mind, which corresponds to the functions of the involuntary nervous system .
Not only are vibration and consciousness so intimately and indissolubly connected but there is specific relationship existing between each kind of vibration and the particular aspect of consciousness which it can give expression to, so that each kind of vibration is matched, as it were, by a corresponding state of consciousness.
This relation may be understood to a certain extent by considering its expression at the lowest level, namely, sensuous perception.
By practising Raja Yoga, all the involuntary functions can be controlled the yama and niyama principles on the healing and stress systems, asanas on the musculoskeletal system and the discipline and tolerance of the body, pranayama on the whole of the respiratory activity, prathyahara, Dharana, Dhyana and Samadhi will control the mind and elevates the level of consciousness.