Are you not the person you used to be?

'Bill, he is not the person that he used to be,' 

ged
What  can this possibly mean? If asked, the person who  made the comment
will probably say, "...well, Bill, he has changed 
in some important way and is no longer the same kind of person.

So if your personhood, your self is a thing, and entity, how can it
change and still be a thing

My identity can be affected by my
own actions and is obviously quite different from my identity
as a particular person.

'He is not the person that he used to be,' they mean something different: 

they mean that he has changed in some important way and is no longer the same kind of person. In this sense of the word, my identity can be affected by my own actions and is obviously quite different from my identity as a particular person

You Tube: On Being in Two Places at One Time.

Bosco Redmond·4 videos 

Dealing with Stray Thoughts - YouTube