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.

About This Quote

About Ren Descartes

Ren Descartes was a 16th-century French philosopher. RenĂ© Descartes was a French philosopher, scientist, and mathematician, widely considered a seminal figure in the emergence of modern philosophy and science. Mathematics was paramount to his method of inquiry, and he connected the previously separate fields of geometry and algebra into analytic geometry. Read more on Wikipedia →

Themes

  • Philosophy — Deep thoughts on existence, knowledge, and the nature of reality
  • Science — Discovery, inquiry, and the wonders of the natural world

More quotes by Ren Descartes

Related Quotes