De Omnibus Dubitandum

Although My Knowledge Grows More And More, Nevertheless I Do Not For That Reason Believe That It Can Ever Be Actually Infinite, Since It Can Never Reach A Point So High That It Will Be Unable To Attain Any Greater Increase.

And Thereby Make Ourselves, As It Were, The Lords And Masters Of Nature.

I Am Thing That Thinks: That Is, A Things That Doubts,affirms, Denies, Understands A Few Things, Is Ignorant Of Many Things, Is Willing, Is Unwilling, And Also Which Imagines And Has Sensory Perceptions.

When I Consider This Carefully, I Find Not A Single Property Which With Certainty Separates The Waking State From The Dream. How Can You Be Certain That Your Whole Life Is Not A Dream?

So Blind Is The Curiosity By Which Mortals Are Possessed, That They Often Conduct Their Minds Along Unexplored Routes, Having No Reason To Hope For Success, But Merely Being Willing To Risk The Experiment Of Finding Whether The Truth They Seek Lies There.