Graham Harman, 2002:

"I footnote particular texts only for the same reason that mapmakers label rivers and monuments: to prevent the traveler from losing track of the landscape.  We are no more obliged to follow Heidegger's own understanding of tool-being than we are to follow the itinerary of Lewis and Clark when driving from St. Louis to Portland, or to limit our uses of electrical power to those devices patented by Thomas Edison himslef.  The historical greatness of explorers or inventors or philosophers does not guarantee that they have exhausted their own subject matter."

-Graham Harman (2002:16-17), Tool-Being.  Open Court Publishing Company 2002.