Even a paranoid can have enemies.

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

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

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

Secrecy lies at the very core of power.

There is nothing more deceptive than an obvious fact.

Once suspicion is aroused, everything feeds it.

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

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.

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.

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.