John Le Carré said this quote

Afterwards Smiley always thought of that interview as a fan dance; a calculated progression of disclosures, each revealing different parts of a mysterious entity. Finally Steed-Asprey, who seemed to be Chairman, removed the last veil, and the truth stood before him in all its dazzling nakedness. He was being offered a post in what, for want of a better name, Steed-Asprey blushingly described as the Secret Service.