River Soul: "Life is long.  In rivers, the water that you touch is the last of what has passed and the first of that which comes, so with time present" 

Leonardo da Vinci

"A drawing dips into this river, picking out an aesthetic moment that is part of the coursing stream.  In order to know this stream you must touch it. Not only do you touch the stream it touches back.  It is important to reflect in your drawings on the intertwining of yourself with your world."

Peter Stanyer & Terry Rosenberg,  'A Foundation course in Drawing.'