Duh on me. I failed to read your post carefully.
So you are saying the emotional response one gets when seeing one's self, that is to say the sense of self awareness, leads to the belief that one has a soul. I wonder if the concept of a soul was created by religon? Something has to be rewarded for living by the rules and forking over cash, so the idea of a soul becomes an important commodity. That which is passed on to the eternal afterlife. I once read that humans were the only species that were aware of their impending death. If so, and I can think of no other creatures that have this awareness, it is the basis on which religion is founded.
Edit: You beat me to the punch there doorknob.