All together, it was the face of a man to be afraid of in a dark alley or lonely place. And yet Tom King was not a criminal, nor had he ever done anything criminal. Outside of brawls, common to his walk in life, he had harmed no one. Nor had he ever been known to pick a quarrel. He was a professional, and all the fighting brutishness of him was reserved for his professional appearances. Outside the ring he was slow-going, easy-natured, and, in his younger days, when money was flush, too open-handed for his own good. He bore no grudges and had few enemies. Fighting was a business with him. In the ring he struck to hurt, struck to maim, struck to destroy; but there was no animus in it. It was a plain business proposition. Audiences assembled and paid for the spectacle of men knocking each other out. The winner took the big end of the purse. When Tom King faced the Woolloomoolloo Gouger, twenty years before, he knew that the Gouger’s jaw was only four months healed after having been broken in a Newcastle bout. And he had played for that jaw and broken it again in the ninth round, not because he bore the Gouger any ill-will, but because that was the surest way to put the Gouger out and win the big end of the purse. Nor had the Gouger borne him any ill-will for it. It was the game, and both knew the game and played it.”
— Jack London, “A Piece of Steak”
Reminds me of Daniel Plainview’s “I have a competition in me.”