"Why, look you now, how unworthy a thing you make of me! You would play upon me; you would seem to know my stops; you would pluck out the heart of my mystery; you would sound me from my lowest note to the top of my compass: and there is much music, excellent voice, in this little organ, yet cannot you make it speak. 'Sblood, do you think I am easier to be play'd on than a pipe? Call me what instrument you will, though you can fret me, you cannot play upon me."

William Shakespeare, Hamlet; Act III Sc. II