There is far more opportunity than there is ability.

Be courageous! Have faith! Go forward.

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

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

A genius is a talented person who does his homework.

I make more mistakes than anyone else I know, and sooner or later, I patent most of them.

Accomplishing something provides the only real satisfaction in life.