I think work is the world's greatest fun.

Radio is just a fashion contrivance that will soon die out. It is obvious that there never will be invented a proper receiver!

There seems to be no limit to which some men will go to avoid the labor of thinking. Thinking is hard work.

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!

To my mind the old masters are not art; their value is in their scarcity.

Most of my ideas belonged to other people who never bothered to develop them.

Success is 90% perspiration and 10% inspiration!