With Regards To Political Enemies

It Is Not His Possession Of Knowledge, Of Irrefutable Truth, That Makes The Man Of Science, But His Persistent And Recklessly Critical Quest For Truth.

The Growth Of Our Knowledge Is The Result Of A Process Closely Resembling What Darwin Called 'natural Selection'; That Is, The Natural Selection Of Hypotheses: Our Knowledge Consists, At Every Moment, Of Those Hypotheses Which Have Shown Their (comparative) Fitness By Surviving So Far In Their Struggle For Existence, A Competitive Struggle Which Eliminates Those Hypotheses Which Are Unfit.

Understanding A Theory Has, Indeed, Much In Common With Understanding A Human Personality. We May Know Or Understand A Man's System Of Dispositions Pretty Well; That Is To Say, We May Be Able To Predict How He Would Act In A Number Of Different Situations. But Since There Are Infinitely Many Possible Situations, Of Infinite Variety, A Full Understanding Of A Man's Dispositions Does Not Seem To Be Possible.

Better Our Hypotheses Die For Our Errors Than Ourselves.

Ignorance Is Not A Simple Lack Of Knowledge But An Active Aversion To Knowledge, The Refusal To Know, Issuing From Cowardice, Pride, Or Laziness Of Mind.