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

There is nothing more deceptive than an obvious fact.

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

Nothing is hidden from the eyes of the observing world.

For sooner will men hold fire in their mouths than keep a secret.

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

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.

Secrecy lies at the very core of power.

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

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

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

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

A regime which combines perpetual surveillance with total indulgence is hardly conducive to healthy development.