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

Thomas Edison (1847-1931) American inventor and businessman

(Attributed)
    (Source)

When told by an associate, Walter S. Mallory, that it was a shame that several months of work on new battery technology hadn't yielded any results. Recorded in Dyer and Martin, Edison: His Life and Inventions, Vol. 2, ch. 24 (1910) as an anecdote by Mallory.

More discussion about this quotation's origins and variants: I Have Gotten a Lot of Results! I Know Several Thousand Things That Won’t Work – Quote Investigator.