“Every sentence I utter must be understood not as an affirmation but as a question.[A caution he gives his students, to b...”

“In a republican nation, whose citizens are to be led by reason and persuasion and not by force, the art of reasoning bec...”

“We shall require a substantially new manner of thinking if mankind is to survive.”

“Most people would rather die than think and many of them do!”

“Reason respects the differences and imagination the similitudes of things.”

“This is one of those cases in which the imagination is baffled by the facts.”

“The eye is diverted from the real business, it is caught by the spectacular action that means nothing--nothing at all.”

“[T]he vast majority of human beings are not interested in reason or satisfied with what it teaches.”

“It takes a very unusual mind to undertake the analysis of the obvious.”

“The task of the real intellectual consists of analyzing illusions in order to discover their causes.”

“If you can talk brilliantly about a problem it can create the consoling illusion that it has been mastered.”

“Looking at small advantages prevents great affairs from being accomplished.”