Did Muhammad Ali really say it?
Impossible is just a big word thrown around by small men who find it easier to live in the world they've been given.
Really: Adidas ad copy, 2004
Wikiquote lists it as misattributed. It is from a 2004 Adidas ad campaign that used Ali's image.
How to post it: Credit it as an Adidas ad line, not an Ali quote.