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

My principal business is giving commercial value to the brilliant - but misdirected - ideas of others.

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.

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

First be sure a thing is wanted or needed, then go ahead.