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.René Descartes
The two operations of our understanding, intuition and deduction, on which alone we have said we must rely in the acquisition of knowledge.René Descartes
The first precept was never to accept a thing as true until I knew it as such without a single doubt.René Descartes
It is only prudent never to place complete confidence in that by which we have even once been deceived.René Descartes
When it is not in our power to follow what is true, we ought to follow what is most probable.René Descartes
I am a writer of books in retrospect. I talk in order to understand; I teach in order to learn.Robert Frost
The chief reason for going to school is to get the impression fixed for life that there is a book side for everything.Robert Frost
In archaeology, context is the basis of many discoveries that are imputed to the deliberate workings of intelligence. If I find a rock chipped in such a way as to give it a sharp edge, and the discovery is made in a cave, I am seduced into ascribing this to tool use by distant, fetid and furry ancestors.Seth Shostak
