A student makes hundreds of pages of photocopies and takes them home, and the manual labor he exercises in doing so gives him the impression that he possesses the work. Owning the photocopies exempts the student from actually reading them. This sort of vertigo of accumulation, a neocapitalism of information, happens to many. Defend yourself from this trap: as soon as you have the photocopy, read it and annotate it immediately. If you are not in a great hurry, do not photocopy something new before you own (that is, before you have read and annotated) the previous set of photocopies. There are many things I do not know because I photocopied a text and then relaxed as if I had read it.
Umberto Eco, How to Write a Thesis (1977) (Cambridge: MIT Press, 2015), p. 125.