I may sound like weirdo- but being a boxing and MMA coach I feel like it's blasphemous to use Ali quotes.
Eh, you're over analyzing it man, it's actually a damn good video.
Regardless of the sport Ali, Marciano, Coleman, Arnold..all these men were masters of their respective professions. And it takes a level of dedication to obtain the things that these men did and do that separates them from the majority of all other human beings again regardless of their profession!