“Normally, her mind was like a busy beach – all day long she would run back and forth, leaving footprints, building small mounds and castles, writing out ideas and diagrams with her fingers in the sand, but when the night tide came in, she would close her eyes and allow each wave of rhythmic breath to wash in and out over her day’s accumulation, and before long the beach would be clear and empty, and she would drift off to sleep.”