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

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

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

Even a paranoid can have enemies.

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

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

Secrecy lies at the very core of power.

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

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

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

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

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

Once suspicion is aroused, everything feeds it.