First be sure a thing is wanted or needed, then go ahead.
Related Quotes
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.
Negative results are just what I want. They're just as valuable to me as positive results. I can never find the thing that does the job best until I find the ones that don't.
My main purpose in life is to make money so I can afford to go on creating more inventions.
I find out what the world needs. Then I go ahead and try to invent it.
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