It makes one realize that the physicality of our world is a boundary to us only if our will is weak; a true champion can accomplish things that a normal person would think impossible.
This is very David Goggins-esque. I support it in some ways in a certain context - however (and an extremely loud and insistent qualifier) - this is simplified too drastically. A will alone will not defeat certain realities. Furthermore, what is a normal person? This entire statement is so problematic.