I would rather have one man with enthusiasm working with me than ten who are complacent.

My main purpose in life is to make money so I can afford to go on creating more inventions.

Genius is one percent inspiration and ninety-nine percent perspiration. As a result, a genius is often a talented person who has simply done all of his homework.

Invention is 10% inspiration and 90% perspiration.

X-rays ... I am afraid of them. I stopped experimenting with them two years ago, when I came near to losing my eyesight and Dally, my assistant practically lost the use of both of his arms.

Success depends on how many experiments you can fit into 24 hours

Five percent of the people think; ten percent of the people think they think; and the other eighty-five percent would rather die than think.