The Zen book came to mind for me also - I read the book four times, trying to penetrate the impenetrable forest of quality.
His thesis is impeccable, I am never certain if the writing style forces one to concentrate on the message or discourages the mind.
Yes, Quality; I too, took that to be the point.
I really liked the two types of mechanics; one so neat and ordered, the other so sloppy, intuitive and quick.
The first one's behavior defined quality as a concept; the second had only a passing use for it as it served him.