Adam Smith (1869). “Essays On, I. Moral Sentiments: II. Astronomical Inquiries; III. Formation of Languages; IV. History of Ancient Physics; V. Ancient Logic and Metaphysicis; VI. The Imitative Arts; VII. Music, Dancing, Poetry; VIII. The External Senses; IX. English and Italian Verses”, p.10
"Danny Boyle: 'As soon as you think you can do whatever you want... then you're sunk'". Interview with Tim Adams, www.theguardian.com. December 4, 2011.