I recklesssly entered a section on etymology, since I thought it was significant. 
 Feel free to improve on it, but please let some of the original intent stay put. 
 The word "soul" did not exist in the times of jesus, socrates or aristotle, and so the quotations, interpretations and translations into the word "soul" from these sources, means that the word should be handled very carefully. One might go as far as saying that since the word "soul", in the sense we use it today, did not exist in hebrew or arameic, and only partly in greek, that the word should not exist in the bible. I will not go that far, since all translation is a matter of interpretation, but this detail becomes significant if one insists that the original scriptures are the source of the meaning of the words.