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

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

Even a paranoid can have enemies.

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

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

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

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.

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