Science May Be Described As The Art

It Is Part Of My Thesis That All Our Knowledge Grows Only Through The Correcting Of Our Mistakes.

It Is Wrong To Think That Belief In Freedom Always Leads To Victory; We Must Always Be Prepared For It To Lead To Defeat. If We Choose Freedom, Then We Must Be Prepared To Perish Along With It.

We Should Therefore Claim, In The Name Of Tolerance, The Right Not To Tolerate The Intolerant.

Psychologism Is, I Believe, Correct Only In So Far As It Insists Upon What May Be Called 'methodological Individualism' As Opposed To 'methodological Collectivism'; It Rightly Insists That The 'behaviour' And The 'actions' Of Collectives, Such As States Or Social Groups, Must Be Reduced To The Behaviour And To The Actions Of Human Individuals. But The Belief That The Choice Of Such An Individualist Method Implies The Choice Of A Psychological Method Is Mistaken.

Serious Rational Criticism Is So Rare That It Should Be Encouraged. Being Too Ready To Defend Oneself Is More Dangerous Than Being Too Ready To Admit A Mistake.