If you would be a real seeker after truth, it is necessary t... - René Descartes
"If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things."
More quotes by René Descartes
"Common sense is the most widely shared commodity in the world, for every man is convinced that he is well supplied with it."
"There is nothing more ancient than the truth."
"Except our own thoughts, there is nothing absolutely in our power."
"To live without philosophizing is in truth the same as keeping the eyes closed without attempting to open them."
"I think; therefore I am."