Howl, howl, howl, howl! O, you are men of stones: Had I your tongues and eyes, I'ld use them so That heaven’s vault should crack. She’s gone for ever! I know when one is dead, and when one lives; She’s dead as earth. Lend me a looking-glass; If that her breath will mist or stain the stone, Why, then she lives.
William Shakespeare, King Lear