Then he was not bound

I remember a man who said;
Free will is dead. We are nothing
but a machine, and chemistry
will not obey the mind.

Then a girl walked up to him:
"I do as I please - and no one told
me I was bound. Once I moved
a mountain up a hill."

The man then said:
"I have been foolish to see
a blocked path where there is none.
From this day I shall be free
and not bound."