Quotations and Literature Forum

Does anyone know who wrote
"You are what I was, I am what you will be."?

_________________
"It's hard to find out who you are when you don't want to look at what you've been"

It is pretty much referred to as a "Latin motto"

'I am what you will be, I was what you are now'.
~inscription on the Tomb of James Rice, 15th Century
http://www.christchurchwaterford.org/what-to-see.html

Sum quod eris, fui quod sis.
I am what you will be, I was what you are.
http://kristen.herber.com/Latin%20Quotes.htm

A reminder inscribed by the ancient Romans on tombstones
http://www.mtsu.edu/~rbombard/RB/notes.html

Quod Sum Eris
"I am what you will be," a motto for a gravestone
http://ablemedia.com/ctcweb/consortium/ ... toes2.html
http://www.latinteach.com/mottoes.html

"i was what you are, i am what you will be"
http://neuro-mancer.mgh.harvard.edu/zeg ... raphy.html