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.

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

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

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

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

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

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

Even a paranoid can have enemies.

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.

Once suspicion is aroused, everything feeds it.

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

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

There is nothing more deceptive than an obvious fact.