After reading and rereading our work, the eye reads badly. Better yet : the eye does not read at all. Memory takes the lead and the mind recites to itself. The eyes does not function as it should anymore. We know the text, and, instead of looking at it, we see in full confidence what should be written. The same process happens with mirage.
Or so was Guizot roughly saying, at the end of his **Ménandre**.