Cartesian Dualism is rejected in philosophy. Obviously someone hasn't yet informed the hoi polloi.

Look at your computer motherboard while it is running and ask yourself, where does your current operating system exist? Some may suggest that it is on the hard drive -- and that isn't entirely wrong, but that's not exactly what is running the show. It's what loaded into the circuitry at boot-up, and is analagous to your brain cells.

Your operating system is loaded up at boot-time, and exists as an electrical field inside your computer's RAM. Likewise, your soul is a product of the energy created in your brain -- a field which surrounds your brain, otherwise known as your mind.

Of course those who suggest that they have something in them which is somehow magically immortal will reject this analogy simply because they have a fear of death and their egos can't handle the truth of death and dying. They will create fantastic stories about souls and such which have absolutely no basis in reality.