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

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

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

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

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

There is nothing more deceptive than an obvious fact.

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

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.

Secrecy lies at the very core of power.

It was funny how I could feel all alone and under surveillance at the same time.

Even a paranoid can have enemies.

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.