A Diamond Is A Piece Of Coal

I Try Not To Invent Things That People Don't Need.

The First Requisite Of Success Is The Ability To Apply Your Physical And Mental Energies To One Problem Without Growing Weary.

I Have Not Failed 700 Times. I Have Not Failed Once. I Have Succeeded In Proving That Those 700 Ways Will Not Work. When I Have Eliminated The Ways That Will Not Work, I Will Find The Way That Will Work.

I Have Not Failed. I've Just Found 10,000 Ways That Won't Work.

We Don't Know A Millionth Of One Percent About Anything.