“Taking ideas seriously does not fit with the rhetorical style of textbooks, which presents events so as to make them seem foreordained along a line of constant progress. Including ideas would make history contingent: things could go either way, and have on occasion. The 'right' people, armed with the 'right' ideas, have not always won. When they didn't, the authors would be in the embarrassing position of having to disapprove of an outcome in the past. Including ideas would introduce uncertainty. This is not textbook style.”

“That idea would be embarrassing because there is something excessive about it, it would take to much energy to defend (while the best possible progressive idea, so to speak, defends itself)...”

“[Americans] were, for one thing, so smitten with the idea of progress that they invented things without having any idea whether those things would be of any use.”

“Siobhan said that when you are writing a book you have to include some descriptions of things. I said that I could take photographs and put them in the book. But she said the idea of a book was to describe things using words so that people could read them and make a picture in their own head.”

“The problem is not the content of textbooks, but the very idea of them.”

“Ideas improve. The meaning of words participates in the improvement. Plagiarism is necessary. Progress implies it. It embraces an author's phrase, makes use of his expressions, erases a false idea, and replaces it with the right idea. ”