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

To invent, you need a good imagination and a pile of junk.

Anything that won't sell, I don't want to invent. Its sale is proof of utility, and utility is success.

I never did anything by accident, nor did any of my inventions come by accident; they came by work.

My main purpose in life is to make money so I can afford to go on creating more inventions.

Everyone steals in commerce and industry. I've stolen a lot, myself. But I know how to steal! They don't know how to steal!