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.

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

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

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

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

Once suspicion is aroused, everything feeds it.

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

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.

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

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

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

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