But if the soul and the 'I' are the same, what has happened to the soul in the case of complete memory loss? Or radical personality change due to brain damage?
Then there's this: The 'I' that exists in this body right now is not precisely the same 'I' that existed in it* a year ago, or 10 years ago, or 35 year ago.
(*keeping in mind that the body itself has turnover - the very atoms that comprise it are in constant flux. The body that exists now is not the same body that existed a year ago, either. And yet, it is - my memory tells me there has been an existing, recognizable body for a continuing awareness to occupy for more than 3 decades now.)
These thoughts, they go nowhere, and yet, they keep coming back.