No prize-fighter can go with high spirits into the strife if he has
never been beaten black and blue; the only contestant who can confidently
enter the lists is the man who has seen his own blood, who has felt his
teeth rattle beneath his opponent’s fist, who has been tripped and felt
the full force of his adversary’s charge, who has been downed in bloody
but not it spirit, one who as often as he falls, rises again with greater
defiance than ever.