It's Coexistence Or No Existence.

It Seems To Me A Fundamental Dishonesty, And A Fundamental Treachery To Intellectual Integrity To Hold A Belief Because You Think It's Useful And Not Because You Think It's True.

Marx's Father Became A Christian When Marx Was A Little Boy, And Some, At Least, Of The Dogmas He Must Have Then Accepted Seem To Have Born Fruit In His Son's Psychology.

I Mean By Intellectual Integrity The Habit Of Deciding Vexed Questions In Accordance With The Evidence, Or Of Leaving Them Undecided Where The Evidence Is Inconclusive. This Virtue, Though It Is Underestimated By Almost All Adherents Of Any System Of Dogma, Is To My Mind Of The Very Greatest Social Importance And Far More Likely To Benefit The World Than Christianity Or Any Other System Of Organized Beliefs.

Although This May Seem A Paradox, All Exact Science Is Dominated By The Idea Of Approximation. When A Man Tells You That He Knows The Exact Truth About Anything, You Are Safe In Inferring That He Is An Inexact Man. Every Careful Measurement In Science Is Always Given With The Probable Error ... Every Observer Admits That He Is Likely Wrong, And Knows About How Much Wrong He Is Likely To Be.

It Is Only In Marriage With The World That Our Ideals Can Bear Fruit; Divorced From It, They Remain Barren.