XIII. THE USE OF SPIES - The Art of War
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XIII. THE USE OF SPIES

1. Sun Tzu said: Raising a host of a hundred thousand

men and marching them great distances entails heavy loss

on the people and a drain on the resources of the State.

The daily expenditure will amount to a thousand ounces

of silver. There will be commotion at home and abroad,

and men will drop down exhausted on the highways.

As many as seven hundred thousand families will be impeded

in their labor.

2. Hostile armies may face each other for years,

striving for the victory which is decided in a single day.

This being so, to remain in ignorance of the enemy's

condition simply because one grudges the outlay of a hundred

ounces of silver in honors and emoluments, is the height

of inhumanity.

3. One who acts thus is no leader of men, no present

help to his sovereign, no master of victory.

4. Thus, what enables the wise sovereign and the good

general to strike and conquer, and achieve things beyond

the reach of ordinary men, is foreknowledge.

5. Now this foreknowledge cannot be elicited from spirits;

it cannot be obtained inductively from experience,

nor by any deductive calculation.

6. Knowledge of the enemy's dispositions can only

be obtained from other men.

7. Hence the use of spies, of whom there are five classes:

(1) Local spies; (2) inward spies; (3) converted spies;

(4) doomed spies; (5) surviving spies.

8. When these five kinds of spy are all at work,

none can discover the secret system. This is called "divine

manipulation of the threads." It is the sovereign's

most precious faculty.

9. Having local spies means employing the services

of the inhabitants of a district.

10. Having inward spies, making use of officials
of the enemy.

11. Having converted spies, getting hold of the enemy's
spies and using them for our own purposes.

12. Having doomed spies, doing certain things openly
for purposes of deception, and allowing our spies to know

of them and report them to the enemy.

13. Surviving spies, finally, are those who bring
back news from the enemy's camp.

14. Hence it is that which none in the whole army are
more intimate relations to be maintained than with spies.

None should be more liberally rewarded. In no other

business should greater secrecy be preserved.

15. Spies cannot be usefully employed without a certain
intuitive sagacity.

16. They cannot be properly managed without benevolence
and straightforwardness.

17. Without subtle ingenuity of mind, one cannot make
certain of the truth of their reports. Next Page

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