Never Answer A Critic, Unless He's Right.

Even When We Know What Is Right, Too Often We Fail To Act. More Often We Grab Greedily For The Day, Letting Tomorrow Bring What It Will, Putting Off The Unpleasant And Unpopular.

Everyone Is Entitled To Be Wrong About Their Opinions, But No One Has The Right To Be Wrong About Their Facts.

Gold Has Worked Down From Alexander's Time... When Something Holds Good For Two Thousand Years I Do Not Believe It Can Be So Because Of Prejudice Or Mistaken Theory.

The Terror Created By Weaponry Has Never Stopped Men From Employing Them.

Science Has Taught Us How To Put The Atom To Work. But To Make It Work For Good Instead Of For Evil Lies In The Domain Dealing With The Principles Of Human Dignity. We Are Now Facing A Problem More Of Ethics Than Of Physics.