Every Solution Of A Problem Raises New

If You Can't Say It Simply And Clearly, Keep Quiet, And Keep Working On It Till You Can.

The History Of Science, Like The History Of All Human Ideas, Is A History Of Irresponsible Dreams, Of Obstinacy, And Of Error. But Science Is One Of The Very Few Human Activities-perhaps The Only One-in Which Errors Are Systematically Criticized And Fairly Often, In Time, Corrected. This Is Why We Can Say That, In Science, We Often Learn From Our Mistakes, And Why We Can Speak Clearly And Sensibly About Making Progress There. In Most Other Fields Of Human Endeavour There Is Change, But Rarely Progress ... And In Most Fields We Do Not Even Know How To Evaluate Change.

No Rational Argument Will Have A Rational Effect On A Man Who Does Not Want To Adopt A Rational Attitude.

The Belief In A Political Utopia Is Especially Dangerous. This Is Possibly Connected With The Fact That The Search For A Better World, Like The Investigation Of Our Environment, Is (if I Am Correct) One Of The Oldest And Most Important Of All The Instincts.

It Is Impossible To Speak In Such A Way That You Cannot Be Misunderstood.