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

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

“Most people would die sooner than think in fact they do.”

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

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

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

“For any single thing of importance, there are multiple reasons.”

“When a question has no correct answer, there is only one honest response.The gray area between yes and no.Silence.”

“What matters is not the facts but how you discover and think about them.”

“Explanations exist; they have existed for all time; there is always a well-known solution to every human problem—neat, p...”

“Doubt is an uncomfortable condition, but certainty is a ridiculous one.”

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