Edward Gibbon

The range of what we think and do is limited by what we fail to notice. And because we fail to notice that we fail to notice, there is little we can do to change; until we notice how failing to notice shapes our thoughts and deeds.

It didn't take long for the world to realize that the Shah was an enlightened liberal next to the bloody reactionary regime that followed, and which executed more people in three months than the Shah had done in 30 years.