I Can Doubt Everything, Except One Thing,

Situations In Life Often Permit No Delay; And When We Cannot Determine The Course Which Is Certainly Best, We Must Follow The One Which Is Probably The Best. This Frame Of Mind Freed Me Also From The Repentance And Remorse Commonly Felt By Those Vacillating Individuals Who Are Always Seeking As Worthwhile Things Which They Later Judge To Be Bad.

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?

The Chief Cause Of Human Errors Is To Be Found In The Prejudices Picked Up In Childhood.

Mathematics Is A More Powerful Instrument Of Knowledge Than Any Other That Has Been Bequeathed To Us By Human Agency.

The Object Of Music Is A Sound. The End; To Delight, And Move Various Affections In Us.