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

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.

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.

We must not always talk in the marketplace of what happens to us in the forest.

There is nothing more deceptive than an obvious fact.

Nothing is hidden from the eyes of the observing world.

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

Once suspicion is aroused, everything feeds it.

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.

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

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