René Descartes said this quote

Common sense is the most widely shared commodity in the world, for every man is convinced that he is well supplied with it.

~ René Descartes

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.

~ René Descartes

Except our own thoughts, there is nothing absolutely in our power.

~ René Descartes

I desire to live in peace and to continue the life I have begun under the motto 'to live well you must live unseen

~ René Descartes