I think work is the world's greatest fun.

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.

I never quit until I get what I want.

I've never made a mistake. I've only learned from experience.

I try not to invent things that people don't need.

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.

The value of an idea lies in the using of it.