Even a paranoid can have enemies.

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

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

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

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

Once suspicion is aroused, everything feeds it.

Nothing is hidden from the eyes of the observing world.

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

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.

The first duty of a good inquisitor is to suspect especially those who seem sincere to him.

There is nothing more deceptive than an obvious fact.

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

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