“No matter how good a liar you are, when you deceive, it's hard to be completely natural. Your tendency is to try so hard to seem natural and sincere that it stands out and can be read. That is why it is so effective to spread your deceptions through people whom you keep ignorant of the truth, people who belive the lie themselves. When working with double agents of this kind, it's always wise to initially feed them some true information, this will establish the credibility of the intelligence they pass along. After that they will be perfect conduits for your lies.”