Generally speaking, espionage offers each spy an opportunity to go crazy in a way he finds irresistible.
The young man shivered. He rolled the stock themes of fantasy over in his mind: cars and stockbrokers and commuters, housewives and police, agony columns and commercials for soap, income tax and cheap restaurants, magazines and credit cards and streetlights and computers... 'It is escapism, true,' he said, aloud. 'But is not the highest impulse in mankind the urge toward freedom, the drive to escape?
Every memorable act in the history of the world is a triumph of enthusiasm. Nothing great was ever achieved without it because it gives any challenge or any occupation a new meaning, no matter how frightening or difficult. Without enthusiasm you are doomed to a life of mediocrity but with it you can accomplish miracles.