and there's also a pretty analogy with the brain

As the slip-box is not a book with just one topic, we don’t need to have an overview of it. On the contrary, we are much better off accepting as early as possible that an overview of the slip-box is as impossible as having an overview of our own thinking while we are thinking. As an extension of our own memory, the slip-box is the medium we think in, not something we think about.