“You don’t need my help to solve this,” said Christopher, and she could see him, behind her eyelids, looking at her with his funny quizzical smile, his eyes such a dark violet behind his spectacles. “You only need to believe that you can solve it. And you can. You are a natural scientist, Grace, and a solver of puzzles. All you have to do is silence the voice in your head that says you aren’t good enough, don’t know enough. I have faith in you.”