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.

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

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

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

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

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

There is nothing more deceptive than an obvious fact.

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

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.