Three may keep a secret, if two of them are dead.

Once suspicion is aroused, everything feeds it.

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

If the world were good for nothing else, it is a fine subject for speculation.

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

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.

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

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

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.

There is nothing more deceptive than an obvious fact.

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

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