Not the glittering weapon fights the fight, but rather the hero's heart.

The proverb contrasts outward show with inner substance: victory does not come from a weapon’s shine or prestige, but from the courage, resolve, and character of the person who wields it. “Glittering weapon” stands for appearances, status, or technology—anything impressive on the surface—while “the hero’s heart” points to moral stamina and will. As a piece of folk wisdom, it generalizes beyond combat to any struggle: tools and advantages matter less than determination and integrity. The line also carries an ethical note, valuing human agency over material display and warning against mistaking ornament for effectiveness.