To invent, you need a good imagination and a pile of junk. - Thomas A. Edison

"When you have exhausted all possibilities, remember this - you haven't."

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

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

"I have friends in overalls whose friendship I would not swap for the favor of the kings of the world."

"The three great essentials to achieve anything worthwhile are, first, hard work; second, stick-to-itiveness; third, common sense."