Now from this relation, from the Soul using the body as an instrument, it does not follow that the Soul must share the body's experiences: a man does not himself feel all the experiences of the tools with which he is working.
It may be objected that the Soul must however, have Sense-Perception since its use of its instrument must acquaint it with the external conditions, and such knowledge comes by way of sense. Thus, it will be argued, the eyes are the instrument of seeing, and seeing may bring distress to the soul: hence the Soul may feel sorrow and pain and every other affection that belongs to the body; and from this again will spring desire, the Soul seeking the mending of its instrument.
But, we ask, how, possibly, can these affections pass from body to Soul? Body may communicate qualities or conditions to another body: but body to Soul? Something happens to A; does that make it happen to B? As long as we have agent and instrument, there are two distinct entities; if the Soul uses the body it is separate from it.
But apart from the philosophical separation how does Soul stand to body?
http://www.theveil.net/myst/plot/en_00_01.html