[Big Papa Goat]

A highly evolved organism posessing a brain with a highly convoluted frontal lobe, allowing us to have the sufficient number of neural connections for reason, allowing us to respond to and manipulate our environment creatively. The result of this reasoning capacity is a desire to understand, and with limited abilities to assess our own physiology, we came up with the idea of the soul to seperate us from the other beings we recognized to be alive. That brings us to you, giving a pseudo-scientific term for the soul, "sentinent energy".

That being said, I have fairly limited knowlege of neurology, so correct me if I'm wrong.