" Thought is an acid, eating us away. At first we imagine it will only eat into that which is rotten and sick and must be removed. But thought thinks otherwise. It eats blindly. It begins with the prey you most gladly throw to it - but don't imagine it will be content with that! It doesn't stop until it has gnawed away the last thing you hold dear. "

― Hjalmar Söderberg , Doctor Glas