“"Bushi no nasaké"—the tenderness of a warrior—had a sound which appealed at once to whatever was noble in us; not that the mercy of a samurai was generically different from the mercy of any other being, but because it implied mercy where mercy was not a blind impulse, but where it recognized due regard to justice, and where mercy did not remain merely a certain state of mind, but where it was backed with power to save or kill.”