I believe that the motion picture is destined to revolutionize our educational system and that in a few years it will supplant largely, if not entirely, the use of textbooks.

Through all the years of experimenting and research, I never once made a discovery. I start where the last man left off... All my work was deductive, and the results I achieved were those of invention pure and simple.

I am quite correctly described as 'more of a sponge than an inventor....'

Unfortunately, there seems to be far more opportunity out there than ability.... We should remember that good fortune often happens when opportunity meets with preparation.

What a man's mind can create, man's character can control.

If I had not had so much ambition and not tried to do so many things, I probably would have been happier, but less useful.

Direct thought is not an attribute of feminity. In this, women are now centuries behind man.