Anyone interested in the near death experience needs to read books by Dr. Raymond Moody. He had done studies - and even was the one to give the NDE it's name - with hundreds of people who have survived near death. It is fascinating reading. All seemed to be given an understanding as to why they needed to come back and finish their life. Some were not happy about coming back and for the rest of their days they longed to return to that place that some may call heaven.