“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.”
Sun Tzu, Master Sun
Art of War
Quoted in The Art of War, Translated by Lionel Giles, Offered by The Project Gutenberg eBook

The use of spies
Turns the tide
Use it wisely and you shall flourish
Use it foolishly and you shall perish
Local spies are hired for answers
Inward spies involves bribing enemy officers
Converted spies are converted for executions
Doomed spies are used for deception
Surviving spies report information
Secrecy of the spies must be insured
Maintain a good relationship to be secured
But also be careful of spies
For it can be your demise
Discerning spies report
Is your first resort




