Word to the metaphysical. Although you forgot to mention that the soul/mind/essence is also lumped into the category. As is God...

I think, therefore I am.
I think God, therefore God is.

God exists! BOO-YAH!


Anywho...DYING, did I hear you say something pertaining to the 'nothing,' to 'nonexistence?' Well, you silly lil' rabbit, such a thing is impossible! There is only existence...and part of that existence isn't physical. Like Burning Bush said...Santa Claus is real...but he's not physical.