Guard more faithfully the secret which is confided to you than the money which is entrusted to your care.

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

Once suspicion is aroused, everything feeds it.

There is nothing more deceptive than an obvious fact.

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

Even a paranoid can have enemies.

To know all is not to forgive all. It is to despise everybody.

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

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

Secrecy lies at the very core of power.

Secrets define us, they mark us, they set us apart from all the others. The secrets which we preserve provide a key to who we are, deep down.

We must not always talk in the marketplace of what happens to us in the forest.

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