" The house beneath slumbered in unbroken stillness. The silence filled his ears with a hum, which grew into a sound of whispering voices. Slowly and irresistibly these voices mastered him and increased the feeling of anxiety which had almost choked him several times that day. What could be the cause of such mental anguish? What could be the strange trouble which had slowly grown within him and had now become so unbearable? He had not fallen into sin. "

― Émile Zola , La Faute de l'abbé Mouret (Les Rougon-Macquart, #5)