All Is To Be Doubted.

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?

If I Found Any New Truths In The Sciences, I Can Say That They Follow From, Or Depend On, Five Or Six Principal Problems Which I Succeeded In Solving And Which I Regard As So Many Battles Where The Fortunes Of War Were On My Side.

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.

The Greatest Minds, As They Are Capable Of The Highest Excellencies, Are Open Likewise To The Greatest Aberrations; And Those Who Travel Very Slowly May Yet Make Far Greater Progress, Provided They Keep Always To The Straight Road, Than Those Who, While They Run, Forsake It.

Desire Awakens Only To Things That Are Thought Possible.