evidence: FACT CHECK: Did Muhammad Ali Say This Quote About The ‘Impossible’? An image shared on Facebook credits professional boxer Muhammad Ali with saying, "Impossible is just a big word thrown around by small men who find it easier to live in the world they’re given than to explore the power they have to change it." [...] Impossible is not a fact. It’s an opinion. Impossible is not a declaration. It’s a dare. Impossible is potential. Impossible is temporary."