"Anything that won't sell, I don't want to invent. Its sale is proof of utility, and utility is success."

"Everything comes to him who hustles while he waits."

"Genius is one percent inspiration and ninety-nine percent perspiration."

"Hell, there are no rules here - we're trying to accomplish something."

"I have not failed. I've just found 10,000 ways that won't work."

"I know this world is ruled by infinite intelligence. Everything that surrounds us -- everything that exists -- proves that there are infinite laws behind it. There can be no denying this fact. It is mathematical in its precision."

"I start where the last man left off."

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

"Restlessness is discontent and discontent is the first necessity of progress. Show me a thoroughly satisfied man and I will show you a failure."

"The reason a lot of people do not recognize opportunity is because it usually goes around wearing overalls looking like hard work."

"To invent, you need a good imagination and a pile of junk."