The good pupils are often brilliant, and they keep you on your toes and take you to the limits of your knowledge. The worst pupils provide a unique insight into the criminal mind.
John le CarreBut I think the real tension lies in the relationship between what you might call the pursuer and his quarry, whether it's the writer or the spy.
John le CarreThe greatest threat to mankind comes from the renunciation of individual scruple in favor of institutional denominators. . . . Real heroism lies, as it always will, not in conformity or even patriotism, but in acts of solitary moral courage. Which, come to think of it, is what we used to admire in our Christian savior
John le Carre