Oliver Sacks, acclaimed author and neurologist, died this past Sunday.  Known for his acute observations, deep commitment to his patients, and best-selling case histories such as "The Man Who Mistook His Wife for a Hat" and "Awakenings", Dr. Sacks wrote with honesty and compassion.  As it became clear that his own life was coming to an end, Dr. Sacks mused eloquently about his life and impending death.