The army that conquers as against the army destined to defeat, is as a beam against a feather in the scales. The attack of conquering forces is as the outburst of long-pent-up waters into sunken valleys. Such are the orders of battle. V THE SPIRIT OF THE TROOPS Sun the Master said:-- The control of large numbers is possible, and like unto that of small numbers, if we subdivide them. By means of drum, bell and flag,[7] the direction of large forces in battle is possible, and like unto the direction of small forces. By the skilful interchange of normal and abnormal manoeuvres are the armies certainly preserved from defeat. The enemy is crushed, like the fall of a grindstone upon an egg, by knowledge of his strength and weakness, and by the employment of truth and artifice. Moreover, in battle the enemy is engaged with the normal and defeated by the abnormal force.[8] The abnormal force, skilfully handled, is like the heaven and earth, eternal; as the tides and the flow of rivers, unceasing; like the sun and moon, for ever interchanging; coming and passing, as the seasons. There are five notes; but by combinations, innumerable harmonies are produced. There are but five colours; but if we mix them, the shades are infinite. There are five tastes, but if we mix them there are more flavours than the palate can distinguish.[9] In war there are but two forces, the normal and the abnormal; but they are capable of infinite variation. Their mutual interchange is like a wheel, having neither beginning or end. They are a mystery that none can penetrate. As the rush of rock-shouldering torrents, so is the spirit of the troops. Like the well-judged flight of the falcon, in a flash crushing its quarry, so should the stroke be timed. Wherefore the spirit of the good fighter is terrifying, his occasions sudden; like the stretched cross-bow, whose string is released at the touch of the trigger. In the maze and tumult of the battle, there is no confusion; in the thick of action the battle array is impenetrable. If discipline be perfect, disorder can be simulated; if truly bold, we can feign fear; if really strong, we can feign weakness. We simulate disorder by subdivision; fear, by spirit; weakness, by battle formation. We set the enemy in motion by adopting different formations to which he must conform. If we offer the enemy a point of advantage, he will certainly take it: we give him an advantage, set him in motion and then fall upon him. Wherefore the good fighter seeks victory from spirit, and does not depend entirely upon the skill of his men. He is careful in his choice, and leaves the rest to battle force; yet, when an opening or advantage shows, he pushes it to its limits. As a log or rock which, motionless on flat ground, yet moves with ever-increasing force when set on an incline, so await the opportunity, and so act when the opportunity arrives.