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

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

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

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

Secrecy lies at the very core of power.

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

For sooner will men hold fire in their mouths than keep a secret.

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

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