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.

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

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

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

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.

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.

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