Curiosity Is Its Own Reason.

The Bitter And The Sweet Come From The Outside, The Hard From Within, From One's Own Efforts.

The Scientific Theorist Is Not To Be Envied. For Nature, Or More Precisely Experiment, Is An Exorable And Not Very Friendly Judge Of His Work. It Never Says "yes" To A Theory. In The Most Favorable Cases It Says "maybe," And In The Great Majority Of Cases Simply "no." If An Experiment Agrees With A Theory It Means For The Latter "maybe," And If It Does Not Agree It Means "no." Probably Every Theory Will Some Day Experience Its "no" - Most Theories, Soon After Conception.

Life Is A Preparation For The Future; And The Best Preparation For The Future Is To Live As If There Were None.

If I Had An Hour To Solve A Problem And My Life Depended On The Solution, I Would Spend The First 55 Minutes Determining The Proper Question To Ask, For Once I Know The Proper Question, I Could Solve The Problem In Less Than Five Minutes.

I Made One Great Mistake In My Life-when I Signed The Letter To President Roosevelt Recommending That Atom Bombs Be Made But There Was Some Justification-the Danger That The Germans Would Make Them.