Once suspicion is aroused, everything feeds it.

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

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.

Secrecy lies at the very core of power.

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

Nothing is hidden from the eyes of the observing world.

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.

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

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

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

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