A book that furnishes no quotations is no book—it is a plaything. Next to the originator of a good sentence is the first quoter of it. How frequently the mere purchase of a book is mistaken for the appropriation of its contents.
I began this as a reply to Timothy Morton's extremely helpful comment on entropy in letters and words (following Shannon, whom I've used elsewhere in discussing the editing of Shakespeare). In fact all the comments were wonderful, so let me say thanks. Thanks!