Thomas A. Edison: [after the latest attempt to find a filament that will work in the electric light] Well, we failed again. That's the net result of nine thousand experiments.
Michael Simon: Too bad, Tom. We know the work you have done. We are as sorry as you are that you didn't get results.
Thomas A. Edison: Results? Man, I got a lot of results. I know nine thousand things now that won't work.

- Spencer Tracy in Edison, the Man (1940)

Thomas A. Edison: [to the Gold Exchange clerk, who once told him he'd have to wait until next Christmas to see Mr. Taggart, before Edison fixed the gold ticker and got an appointment with Taggart:] Merry Christmas.

- Spencer Tracy in Edison, the Man (1940)

Ben Els: I keep worryin' about Bunt. I guess I won't get a wink of sleep tonight.
Thomas A. Edison: Ah, Mr. Els, you shouldn't try to do two things at once. If you're gonna sleep, sleep. If you're gonna worry, why stay awake and make a good job of it.

- Spencer Tracy in Edison, the Man (1940)

Mr. Taggart: We've no guarantee that these theories of yours are workable.
Thomas A. Edison: Well, most electricity is theory yet.
Mr. Taggart: That's the trouble. Beyond a point what good is electricity anyway?
Thomas A. Edison: What good is a newborn baby?

- Spencer Tracy in Edison, the Man (1940)