While I have this book in front of me: "all sorts of people were telling me that I needed to put quotes on the back cover of the book [A New Kind of Science] ... Steve said, 'Isaac Newton didn't have back-cover quotes; why do you want them?'"
This reminds me of one of my favourite Ayn Rand quotes: after being asked to shorten John Galt's (interminable, 70-odd-page, tiny print) speech in Atlas Shrugged - "Would you cut the Bible?"!
