“He who knows when he can fight and when he cannot, will be victorious.”
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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.
Sun Tzu
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Know your enemy and know yourself and you can fight a hundred battles without disaster.
Sun Tzu
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