Who (or what) are we, anyway?

Is our body really 'ours' in the way we think it is?
Every year, 98% of the atoms in our body are replaced. I am not the same 'me' than I was at the age of five, or at the time I was born.
Our bodies are ever changing vessels for our souls or consciousness - an ever changing array of atoms held together by a series of physical forces, containing whatever it is that makes us 'us' upon this earth for as long as it can endure.