The lyrics “You must be swift as a coursing river / With all the force of a great typhoon” etc. is similar in style and substance to this quote from Sun Tzu: “Let your rapidity be that of the wind, your compactness that of the forest. In raiding and plundering be like fire, is immovability like a mountain. Let your plans be dark and impenetrable as night, and when you move, fall like a thunderbolt.”