The whole body thinks, as it were, because of the pervasion of the body by the mind. This mind which is not an entity or a substance like physical objects, and appears to be a moving process, is our inner working faculty. We live a psychic life, rather than a physical life. Our joys and sorrows are psychic and not physical. Our activities, also, are psychic.
Physical activities are no activities if they are divested of the psychic content.
It comes to this finally, that the mind is everything. The whole world is nothing but mind operating in mysterious ways, in its wondrous relationships of variegated types. But in Eastern psychology, a further diversity of this content has been noticed. It has infinite varieties of expression but in the main outline we may say that our psyche consists of many functions on account of which it takes various names. Even these aspects of nomenclature as understanding, willing, and feeling are the outcome of the different functions that the one psyche performs.