This is a quote from The Brain That Changes Itself (a fascinating book that Kris gave me a while back) that has stuck with me for a while after reading it. That it comes from a chapter focused on pain and phantom limbs is almost irrelevant, as the broader implications extend to all the senses and our sense of identity as well.
[In order to feel pain] we need only a body image, produced by our brain maps. People with actual limbs don't usually realize this, because the body images of our limbs are perfectly projected onto our actual limbs, making it impossible to distinguish our body image from our body. "Your own body is a phantom," says [pain researcher] Ramachandran, "one that your brain has constructed purely for convenience."
