"I suppose therefore that all the things I see are false; I believe that none of those things ever existed which my fallacious memory represents to me; I consider that I possess no senses; I imagine th…"

"I desire to live in peace and to continue the life I have begun, adopting as my motto 'to live well, one must live concealed'."

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

"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."

"It is not enough to know, one must also apply; it is not enough to wish, one must also do."