Imagine you are sitting in a field of grass, green as far as the eye can see. All around you, you can see the circular ring of blue-grey horizon from where rises the massive bubble of sky. It is empty, clear and blue. But out of the corner of your eye you spot a single, large cloud interrupt the dawn-washed sky. As the cloud floats slowly into the center of your vision, it is changing shape. At first, you don’t recognize the shape as anything but are mildly following the cloud as an object of interest. But with a start you realize, suddenly and surely, that the cloud is slowly forming your head, your face and your nose and etching out your astonished smile in fluffy, white cottony-marble.