"Obscurity was his nature, as well as his profession. The byways of espionage are not populated by the brash and colourful adventurers of fiction. A man who, like Smiley, has lived and worked for years among his country’s enemies learns only one prayer: that he may never, never be noticed. Assimilation is his highest aim, he learns to love the crowds who pass him in the street without a glance; he clings to them for his anonymity and his safety."