" What is it that allows human beings to see through each other’s pretendings? For I understood quite clearly in that moment that she was anxious. Perhaps emotions have a smell or a taste; perhaps we transmit them unknowingly by vibrations in the air. Whatever the means, I knew just as surely that it was nothing about me in particular that alarmed her, but only the fact that I had come and was a stranger. "

― Diane Setterfield , The Thirteenth Tale