I loved this, from http://www.realpeoplepress.com/booklist/new.html
the promo page of Steve Andreas's new book. It may have a passing relevance to Clean?

Six Blind Elephants

Were discussing what wise men were like (never having seen one).
Failing to agree, they decided to find one and determine what
it was like by direct experience.
The first blind elephant felt the wise man, and declared,
“Wise men are flat.”
After feeling the wise man, the other blind elephants agreed.*

*“We have to remember that what we observe is not nature in itself,
but nature exposed to our method of questioning.”

—Werner Heisenberg