Note 11 — Chapter III

Henry Colin, Essai sur l’État mental des Hystériques; Paris, 1890, p. 59: ‘Two great facts control the being of the hereditary degenerate: obsession [the tyrannical domination of one thought from which a man cannot free himself; Westphal has created for this the good term ‘Zwangs-Vorstellung,’ i.e., coercive idea] and impulsion—both irresistible.’