“The end and aim of spying in all its five varieties is knowledge of the enemy; and this knowledge can only be derived, in the first instance, from the converted spy. Hence it is essential that the converted spy be treated with the utmost liberality.”
“It's the oldest question of all, George. Who can spy on the spies?”
“I got nothing. Even the spies I’m spying on who are spying on other spies got nothing.”
“And as every spy knows, common enemies are how allies always begin.”
“Waiting. Like it or not, it's a skill all spies have to master eventually.”
“Further, an excess of legislation defeats its own ends. It makes the whole population criminals, and turns them all into police and police spies. The moral health of such a people is ruined for ever; only revolution can save it.”