Imagine yourself as a skilled skier, having come off the lift, now advancing to the beginning of the slope. You scan the slope ahead, knowing that in moments you will be speeding across the snow. Your body dodging and weaving, maintaining speed and posture, and your spirit soaring. You are both freed from your everyday existence yet tied to the world through the textures of the snow, some powdery, some packed and slick, as your feet glide over and through them, their familiar sounds and vibrations guiding you almost unawares. People often say...