Young Man, The Secret Of My Success

Knowledge-it Excites Prejudices To Call It Science-is Advancing As Irresistibly, As Majestically, As Remorselessly As The Ocean Moves In Upon The Shore.

It Is Mere Childishness To Expect Men To Believe As Their Fathers Did; That Is, If They Have Any Minds Of Their Own. The World Is A Whole Generation Older And Wiser Than When The Father Was Of His Son's Age.

While We've Youth In Our Hearts, We Can Never Grow Old.

Most Of Us Retain Enough Of The Theological Attitude To Think That We Are Little Gods.

If There Is Any Principle Of The Constitution That More Imperatively Calls For Attachment Than Any Other It Is The Principle Of Free Thought, Not Free Thought For Those Who Agree With Us But Freedom For The Thought That We Hate.