Thomas A. Edison

I never once made a discovery ... I speak without exaggeration that I have constructed three thousand different theories in read more

I never once made a discovery ... I speak without exaggeration that I have constructed three thousand different theories in connection with the electric light ... Yet in only two cases did my experiments prove the truth of my theory.

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

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

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

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

Maturity is often more absurd than youth and very frequently is most unjust to youth.

Maturity is often more absurd than youth and very frequently is most unjust to youth.

The body is a community made up of its innumerable cells or inhabitants.

The body is a community made up of its innumerable cells or inhabitants.