“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, The Art of War

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“He who is prudent and lies in wait for an enemy who is not, will be victorious.” 
― Sun Tzu, The Art of War

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“If you know the enemy and know yourself, your victory will not stand in doubt; if you know Heaven and know Earth, you may make your victory complete.” 
― Sun Tzu, The Art of War