Whoever you are and whatever work you do, no one has ever lived your life with your particular challenges and possibilities. No one has ever raised that child before, even if you've raised two already. No one has ever worked in that particular office before with it peculiar mix of personalities and challenges. No one has ever taken care of that patient at this moment with these particular challenges. "You" hasn't been attempted before.
-- Rob Bell, How to Be Here, p. 50