Variant: When it is not in our power to follow what is true, we ought to follow what is most probable.
Rene DescartesSo far, I have been a spectator in this theater which is the world, but I am now about to mount the stage, and I come forward masked.
Rene DescartesMathematics is a more powerful instrument of knowledge than any other that has been bequeathed to us by human agency.
Rene DescartesI 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.
Rene Descartes