Rene Descartes — "The reading of all good books is like a conversation with the finest minds of pa…"

"The first precept was never to accept a thing as true until I knew it as such without a single doubt."

"I should know better than to believe that everything I perceive through my senses is true."

"Common sense is the most widely shared commodity in the world, for every man is convinced that he is well supplied with it."

"The two operations of our understanding, intuition and deduction, on which alone we have said we must rely in the acquisition of knowledge."

"I confess that I have never been able to find out what is the 'substantial form' of a human body, or how it differs from the form of a statue."