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The important thing is that short and strenuous reverence be paid to the spirit of discipline. Three things keep a body of troops in fighting form: fighting spirit, strength and discipline. Fighting spirit – as I have said before – is the least easy to influence. It is the great prerequisite and justification of war – the spirit of the race and of the blood pledged to the last drop. There lie the roos of the strength whose full development is dependent on outward conditions, fresh air nourishment, clothing, and a lot else. When this soil fails fighting spirit is like a seedling plated in arenaceous quartz – it goes on growing for a while of its own resources and then gives out. It is a tragic destiny when a great enterprise comes to grief from this cause. Finally, the purpose of discipline is to economize and direct the two elements so that they are brought to bear on one aim with overwhelming force. It is a means, not an end; it is in seeing it in its true proportion that the real fighter is distinguished from the soldier. It is one of the danger-points of the Prussian system that it easily loses sight of the spirit in the letter and of real strength in the empty show of it. One of the most terrible apparitions is the sheer drill-master – a machine that goes by clockwork. It is bound to break down for the mere reason that in war there is no rule but the exception.
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