Quote by Thomas A. Edison (1847-1931) , Thomas Edison (1847-1931)

• Just because something doesn't do what you planned it to do doesn't mean it's useless.

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

• There is no expedient to which a man will not go to avoid the labor of thinking.

• We don't know a millionth of one percent about anything.

• Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.

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