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

“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.”

“The beginning of thought is in disagreement - not only with others but also with ourselves.”

“When analytic thought, the knife, is applied to experience, something is always killed in the process.”

“We only think when we are confronted with a problem.”

“Thinking is the most overrated human activity.”

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

“The rationalist imagines an imbecile-free society; the empiricist and imbecile-proof one, or even better, a rationalist-...”

“Those who are long on logic, definitions, abstractions, and formulas are frequently short on a sense of the concrete.”

“How dangerous can false reasoning prove!”