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

—William Hazlitt, 1823

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

—Petronius, c. 60

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

—Nathaniel Hawthorne, 1850

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

—George Herbert, c. 1621

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

—Oscar Wilde, 1895

Secrecy lies at the very core of power.

—Elias Canetti, 1960

There is nothing more deceptive than an obvious fact.

—Arthur Conan Doyle, 1891

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

—Cory Doctorow, 2013

Nothing is hidden from the eyes of the observing world.

—Aleksandr Pushkin, 1837

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

—Aeschylus, c. 458 BC

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

—Quentin Crisp, 1968

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

—George Eliot, 1860

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

—Benjamin Franklin, 1735

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

—David Sedaris, 2004

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

—P.D. James, 1992

Even a paranoid can have enemies.

—Henry Kissinger, 1977

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

—Umberto Eco, 1980