Samuel Johnson, Memory rarely deficient:
Others I have found unalterably persuaded, that nothing is certainly remembered but what is transcribed; and they have, therefore, passed weeks and months in transferring large quotations to a commonplace-book. Yet, why any part of a book, which can be consulted at pleasure, should be copied, I was never able to discover. The hand has no closer correspondence with the memory than the eye. The act of writing itself distracts the thoughts, and what is read twice is commonly better remembered than what is transcribed. This method, therefore, consumes time without assisting memory