“The purpose of education is to replace an empty mind with an open one.”

“Travel's greatest purpose is to replace an empty mind with an open one.”

“It must be remembered that the purpose of education is not to fill the minds of students with facts... it is to teach them to think.”

“Empires do not suffer emptiness of purpose at the time of their creation. It is when they have become established that aims are lost and replaced by vague ritual. -Words of Muad'dib by Princess Irulan.”

“Have an open mind! Have an empty cup!”

“Mattia thought there was nothing good about having his mind. That he would happily have unscrewed it and replaced it with a different one, or even with a package of biscotti, provided it was empty and light. He opened his mouth to reply that feeling special is the worst kind of cage that a person can build for himself, but he didn't say anything.”