“What did I know of your fantasies? Why do we know so little about the fantasies of our parents? What do we know of somebody if we know nothing of the images passed to him by his imagination?”

“We forgot what happened yesterday. We know all about Paris Hilton. We know about that. But what do we know about why we are there in Iraq?”

“What do we know? What do we really know? He licks his dried cracked lips. We know this apodictic rock beneath our feet. That dogmatic sun above our heads. The world of dreams, the agony of love and the foreknowledge of death. That is all we know. And all we need to know? Challenge that statement. I challenge that statement. With what? I don't know.”

“To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.”

“To know that we know what we know, and that we do not know what we do not know, that is true knowledge.”

“Confucius said, "To know that we know what we know, and that we do not know what we do not know, that is true knowledge.”