Secrecy lies at the very core of power.

If the world were good for nothing else, it is a fine subject for speculation.

Nothing is hidden from the eyes of the observing world.

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

There is a sickness among tyrants: they cannot trust their friends.

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

I will never again command an army in America if we must carry along paid spies. I will banish myself to some foreign country first.

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

Once suspicion is aroused, everything feeds it.

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.

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

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

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