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

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

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.

If you read somebody’s diary, you get what you deserve.

Secrecy lies at the very core of power.

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

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

Even a paranoid can have enemies.

Nothing is hidden from the eyes of the observing world.

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

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

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

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