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

—William Hazlitt, 1823

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

—Francis Bacon, 1625

Secrets define us, they mark us, they set us apart from all the others. The secrets which we preserve provide a key to who we are, deep down.

—Nuruddin Farah, 1998

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

—Aeschylus, c. 458 BC

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

—Petronius, c. 60

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

—Isocrates, c. 370 BC

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

—P.D. James, 1992

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

—Benjamin Franklin, 1735

There is nothing more deceptive than an obvious fact.

—Arthur Conan Doyle, 1891

Secrecy lies at the very core of power.

—Elias Canetti, 1960

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

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

—George Herbert, c. 1621