Once suspicion is aroused, everything feeds it.

Three may keep a secret, if two of them are dead.

Secrecy lies at the very core of power.

Spies are of no use nowadays. Their profession is over. The newspapers do their work instead.

The first duty of a good inquisitor is to suspect especially those who seem sincere to him.

Even a paranoid can have enemies.

The life of spies is to know, not be known.

There is nothing makes a man suspect much, more than to know little.

Secrets are rarely betrayed or discovered according to any program our fear has sketched out.