“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.”

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

“Theory-the seeing of patterns, showing the forest as well as the trees”

“Make a spurious division of one process into two, forget that you have done it, and then puzzle for centuries as to how...”

“[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.”

“Never accept ultimatums, conventional wisdom, or absolutes.”