Everything Changes by Bertolt Brecht

Everything changes. You can make
A fresh start with your final breath.
But what has happened has happened. And the water
You once poured into the wine cannot be
Drained off again.

What has happened has happened. The water
You once poured into the wine cannot be
Drained off again, but
Everything changes. You can make
A fresh start with your final breath.

http://www.cs.brandeis.edu/~jamesf/goodwoman/brecht_bio.html