I have not failed. I have successfully discovered 1200 ideas that don't work.

Nature made us - nature did it all - not the gods of the religions.

Results! Why, man, I have gotten a lot of results. I know several thousand things that won't work.

From his neck down a man is worth a couple of dollars a day, from his neck up he is worth anything that his brain can produce.

There is a better way for everything. Find it.

The stomach is the only part of man which can be fully satisfied. The yearning of man's brain for new knowledge and experience and for more pleasant and comfortable surroundings never can be completely met. It is an appetite which cannot be appeased.

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