The dual nature of mankind

• "the street shone out in contrast to its dingy neighbourhood, like a fire in a forest" - chapter 1
• "the dismal quarter of Soho" - chapter 4
• "there's a singular resemblance; the two hands are in many points identical; only differently sloped" - chapter 5
• "half full of a blood-red liquor" - chapter 9
• "good and ill which divide and compound man's dual nature" - chapter 10
• "man is not truly one, but truly two" - chapter 10