ren descartes

“ Each problem that I solved became a rule which served afterwards to solve other problems. ”

“ To live without philosophizing is in truth the same as keeping the eyes closed without attempting to open them. ”

“ But in my opinion, all things in nature occur mathematically. ”

“ It is in the nature of our mind to construct general propositions on the basis of our knowledge of particular ones. ”

“ When I was examining what I was, I realized that I could pretend that I had no body... but I could not pretend in the same way that I did not exist. ”

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

“ Our convictions result from custom and example very much more than from any knowledge that is certain. ”

“ 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. ”

“ The chief cause of human errors is to be found in the prejudices picked up in childhood. ”

“ There is nothing more ancient than the truth. ”