Omnia Apud Me Mathematica Fiunt.

The Only Thing That I Know, Is That I Know Nothing

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.

But I Cannot Forget That, At Other Times I Have Been Deceived In Sleep By Similar Illusions; And, Attentively Considering Those Cases, I Perceive So Clearly That There Exist No Certain Marks By Which The State Of Waking Can Ever Be Distinguished From Sleep, That I Feel Greatly Astonished; And In Amazement I Almost Persuade Myself That I Am Now Dreaming.

Variant: When It Is Not In Our Power To Follow What Is True, We Ought To Follow What Is Most Probable.