Replacement

I'm not who I used to be
Each not who I used to be
Each piece who I used to be
Each piece was I used to be
Each piece was removed used to be
Each piece was removed, changed to be
Each piece was removed, changed slowly, be
Each piece was removed, changed slowly, subtly
Until piece was removed, changed slowly, subtly
Until finally was removed, changed slowly, subtly
Until finally now removed, changed slowly, subtly 
Until finally now the changed slowly, subtly 
Until finally now the difference slowly, subtly  
Until finally now the difference is subtly
Until finally now the difference is clear
I finally now the difference is clear
I look now the difference is clear
I look different the difference is clear
I look different than difference is clear 
I look different than I is clear 
I look different than I really clear
I look different than I really appear
Yet look different than I really appear
Yet something different than I really appear
Yet something within than I really appear
Yet something within me I really appear
Yet something within me measures really appear
Yet something within me measures my appear
Yet something within me measures my size
Comparing something within me measures my size
Comparing the within me measures my size
Comparing the me me measures my size
Comparing the me it measures my size
Comparing the me it does my size
Comparing the me it does not size
Comparing the me it does not recognize