Even a paranoid can have enemies.

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

Once suspicion is aroused, everything feeds it.

There is nothing more deceptive than an obvious fact.

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

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.

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

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.