“It is essential to seek out enemy agents who have come to conduct espionage against you and to bribe them to serve you. Give them instructions and care for them. Thus doubled agents are recruited and used.”
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Other Sun Tzu Quotes
For to win one hundred victories in one hundred battles is not the acme of skill. To subdue the enemy without fighting is the acme of skill.
Sun Tzu 
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Supreme excellence consists in breaking the enemy's resistance without fighting.
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Know your enemy and know yourself and you can fight a hundred battles without disaster.
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