A reporter called on Edison to interview him about a substitute for lead in the manufacture of storage batteries that the scientist was seeking. Edison informed the man that he had made 20,000 experiments but none had worked. "Aren't you discouraged by all this waste of effort?" the reporter asked. Edison: "Waste! There's nothing wasted. I have discovered 20,000 things that won't work."

The entity that gives life and motion to the human body is finer still and lies infinitely beyond the reach of our finest scientific instruments. When this entity deserts the body, the body is like a ship without a rudder - deserted, motionless, dead.

Every wrong attempt discarded is another step forward

Everything comes to him who hustles while he waits.

I find out what the world needs. Then I go ahead and try to invent it

The memory of my mother will always be a blessing to me.

Your worth consists in what you are and not in what you have.