Quote from : On Being a Rat and Other Observations Book

The number seven is magical, they say. Seven years ’til our cells completely regenerate. Seven years ’til Jacob possesses Rachel, no, Leah, and seven more for Rachel. Seven days in a week. Post traumatic stress often resolves itself in toto only after seven full years have passed. Such is the case for some brain trauma patients too. Seven. It’s a number worth remembering.