" And then they would sit together at the dining room table and start on a lesson, one of the many thousands that he taught her in her life. When she asked him a question that he thought was intelligent he slapped one hand down on the table in celebration. “That is exactly the question to ask,” he told her. When she asked him a question that revealed some chasm in her learning, some gap where a concept should have existed, he put his head in his hands as if trying to summon the energy to explain all that would need to be explained to her to make her fully formed. "

― Liz Moore , The Unseen World