"Anything that won't sell, I don't want to invent."

"I make more mistakes than anyone I know, and sooner or later, I patent them all."

"Opportunity is missed by most people because it is dressed in overalls and looks like work."

"Many of life's failures are people who did not realize how close they were to success when they gave up."

"The first thing is to find out what the world needs; then proceed to invent it."