Many of us will be obsessed with one or another kind of secret or revelation, be it gossip about friends or ourselves, a fantasy about spies, or a worry about the most personal information now stored in data banks. But few of us think about secrets in general, or about the moral rights and wrongs of hiding or exposing them.

The word 'revolution' first brings to mind violent upheavals in the state, but ideas of revolution in science, and of political revolution, are almost coeval. The word once meant only a revolving, a circular return to an origin, as when we speak of revolutions per minute or the revolution of the planets about the sun.

Although some secrecy is odious, some is essential just to preserve our sense of self.

Ian Hacking Quotes