2 quotes. Authors include Thomas Edison.
“If I find 10,000 ways something won't work, I haven't failed. I am not discouraged, because every wrong attempt discarded is another step forward.”
— Thomas Edison · Perseverance · Success · Inspirational · Motivational
“Results! Why, man, I have gotten a lot of results. I know several thousand things that won't work.”
— Thomas Edison · Success · Failure · Perseverance