Here are some quotes from David Weinberger's Reading Aristotle -- a short article on KMWorld from 2004.
"After all, the music of Aristotle's thought comes from his assumption that the principles of knowledge are the same as the principles of the universe. The categories are not "mere" categories of thought for him. They are also the way the cosmos is arranged. If the order of knowledge and the order of the world are not the same, reasoned Aristotle, then knowledge isn't possible. Knowledge is only possible if the universe is ordered in knowable ways."
"a world apart from the categories of understanding would be by definition unknowable"
Weinberger's ideas are very relevant to my thesis on the Visual Memex and his writings have been a great influence on me. I've recently been on a bit of a Weinberger-reading/listening-binge after I found some of his lectures as Podcasts!
David Weinberger is the author of Everything Is Miscellaneous: The Power of the New Digital Disorder. The book's accompanying blog can be found here: http://www.everythingismiscellaneous.com/