“You don’t see yourself very clearly, Effy.” Preston shifted in his seat so that they were facing one another. “Challenging me isn’t pestering. I’m not always right. Sometimes I deserve to be challenged. And changing your mind isn’t foolish. It just means you’ve learned something new. Everyone changes their mind sometimes, as they should, or else they’re just, I don’t know, stubborn and ignorant. Moving water is healthy; stagnant water is sickly. Tainted.”