Sticking To It Is The Genius.

Your Worth Consists In What You Are And Not In What You Have.

During All Those Years Of Experimentation And Research, I Never Once Made A Discovery. All My Work Was Deductive, And The Results I Achieved Were Those Of Invention, Pure And Simple. I Would Construct A Theory And Work On Its Lines Until I Found It Was Untenable. Then It Would Be Discarded At Once And Another Theory Evolved. This Was The Only Possible Way For Me To Work Out The Problem.

I Am Afraid Of Radium And Polonium ... I Don't Want To Monkey With Them.

The Three Things That Are Most Essential To Achievement Are Common Sense, Hard Work And Stick-to-it-iv-ness.

Until Man Duplicates A Blade Of Grass, Nature Can Laugh At His So Called Scientific Knowledge.