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tion as their transport, and interact with the brain and nervous system. Together they constitute an integral coordinating system now called the neuro-endocrine system. This system controls and regulates not only every bodily function but also profoundly influences mental states, emotions, thought, speech and behavioural patterns of the individual. Thus, the endocrines act as transformers between the most subtle spiritual self and gross physical body. They are gross as compared to the domain of adhyuvasāya, but subule when compared to the gross constituents, viz. muscles, blood and other bodily organs. This, then, is the inter-communicating mechanism within the gross body which translates the code of intangible and imperceptible code of adhyavasāya into a form crude enough to function through flesh and bones.
Thought, speech and muscular action together constitute the domain of yoga' or bodily activity. It is not the domain of knowledge but that of action. The domain of knowledge extends as far as citta and then ends, while the domain of emotion ends at leśyā. From there onwards they manifest themselves through the three subordinate instruments of thinking, vocal equipment and the muscular system. The functions of the niental faculty are thinking, planning (for the future), and memorizing (the past). It is not an instrument of knowledge. It is subordinate to cilla and leśyā, and carries out their orders. Prior to this, it does not exist.
To recapitulate the organizational chart, we have psyche or soul at the centre, surrounded by the contaminating envelope of kaşāya (created by the karnu-sarīra). The psyche expresses itself by radiations which have to pass through the domain of kaṣāya, which they cross to become adhyavasāya. These interact with leśyā and produce the emotions and feelings. Next comes the domain of action (yoga). It has three
1.
The term yoga here has a meaning different from the one used in the sense of sådhanā of asana (postures). pranayamın (breathing exercise) etc. Here it simply means any activity.
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