It's the age-old question -- who am I? -- posed by a fellow blogger that reminded me of my younger ponderous days. Who am I, my younger self wondered. Am I solely my physical being? Or solely my mental being? Or even my spiritual being, or the energy that embodies it? If I were any of these by themselves, would I be able to remove the other parts and still be convinced that I am me? If I were defined completely by my mental existence, would I still exist the same if my arms and legs were removed, if my brain were extracted and kept alive by artificial support means, while my body lay decaying 10 meters away? "I think, therefore I exist." That would still hold true. So, then ... who am I?