Hi Viviane, if you want to know where your souls is or what it is, the closest you will get to understanding it is to look onto where your heart is. If you try to measure it by science the closest you can get is to read the genesis account that Adam became a living soul only after he had been given the breath of life or again the text that speaks of the life of the soul is in its blood, these are simply ways of telling people long ago that our treasure is where our heart is and in today's times what is more important than ones life..or the quality of it?..your questions are logical according to the medical model but try the same questions by the social model, the medical model highlights the traditional western logic in biological cause and effect the things you can put in a test tube and measure, the social model highlights the effect on how we feel according to how we cope with circumstances that are often beyond our control so they take us out of our comfort zone.
The expressions dead as a dodo has a biological meaning, being dead to the world simply means one is in a deep sleep and totally unaware of what is happening, totally different to the 'happy soul' and then there is soul music.
Thank you so much for your input which has been very theraputic to my soul being able to respond to, however I have to move on as the range of reply's is expanding and getting away from the Bibles own logic.
Regards Terry