You are stronger when you defeat pain. A man must be able to fight, that means fight the urge to cry out in pain or let pain defeat your purpose, your bravery, your willingness to do what needs to be done. Pain in mos cases is just another obstacle to be overcome.
What I know is if I'd let pain stop me --I would have lost tons of fights.
Losing is not an option unless one is knocked out, dead or totally incapacitated.
Sons are taught this because courage, bravery, duty and oft even life depends upon it..
My father and my grandfather can not be wrong about this.... ---Tyr