It seems to me that being the right size for your world – and knowing that both you and your world are not by any means fixed dimensions – is a valuable clue to learning how to live. Mrs Winterson was too big for her world, but she crouched gloomy and awkward under its low shelf, now and again exploding to her full three hundred feet, and towering over us. Then, because it was useless, redundant, only destructive, or so it seemed, she shrank back again, defeated.