Most Of The Greatest Evils That Man

I Do Not Pretend To Start With Precise Questions. I Do Not Think You Can Start With Anything Precise. You Have To Achieve Such Precision As You Can, As You Go Along.

The First Essential Character [of Civilization], I Should Say, Is Forethought. This, Indeed, Is What Mainly Distinguishes Men From Brutes And Adults From Children.

It Will Be Said That The Joy Of Mental Adventure Must Be Rare, That There Are Few Who Can Appreciate It, And That Ordinary Education Can Take No Account Of So Aristocratic A Good. I Do Not Believe This. The Joy Of Mental Adventure Is Far Commoner In The Young Than In Grown Men And Women. ...it Is Rare In Later Life Because Everything Is Done To Kill It During Education.

Upon Hearing Via Littlewood An Exposition On The Theory Of Relativity: To Think I Have Spent My Life On Absolute Muck.

It Is Not What The Man Of Science Believes That Distinguishes Him, But How And Why He Believes It. His Beliefs Are Tentative, Not Dogmatic; They Are Based On Evidence, Not On Authority Or Intuition.