Trade Is A Social Act. Whoever Undertakes

It Is Not The Feeling Sure Of A Doctrine (be It What It May) Which I Call An Assumption Of Infallibility. It Is The Undertaking To Decide That Question For Others, Without Allowing Them To Hear What Can Be Said On The Contrary Side. And I Denounce And Reprobate This Pretension Not The Less, If Put Forth On The Side Of My Most Solemn Convictions.

... All Ideas Need To Be Heard, Because Each Idea Contains One Aspect Of The Truth. By Examining That Aspect, We Add To Our Own Idea Of The Truth. Even Ideas That Have No Truth In Them Whatsoever Are Useful Because By Disproving Them, We Add Support To Our Own Ideas.

Even If The Received Opinion Be Not Only True, But The Whole Truth; Unless It Is Suffered To Be, And Actually Is, Vigorously And Earnestly Contested, It Will, By Most Of Those Who Receive It, Be Held In The Manner Of A Prejudice, With Little Comprehension Or Feeling Of Its Rational Grounds

Each Undervalues That Part Of The Materials Of Thought With Which He Is Not Familiar.

Landlords Grow Rich In Their Sleep Without Working, Risking Or Economising