More quotes by René Descartes

"I suppose therefore that all things I see are illusions; I believe that nothing has ever existed of everything my lying memory tells me. I think I have no senses. I believe that body, shape, extension, motion, location are functions. What is there then that can be taken as true? Perhaps only this one thing, that nothing at all is certain."
"To live without philosophizing is in truth the same as keeping the eyes closed without attempting to open them."
"The reading of all good books is like conversation with the finest men of past centuries."
"Common sense is the most widely shared commodity in the world, for every man is convinced that he is well supplied with it."
"Except our own thoughts, there is nothing absolutely in our power."