"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"

This quote from Sun Tzu's The Art of War encourages that it is necessary to recognize and approach opponent spies and bribe them to work as double agents. In this manner, they can provide info about the opponent's strategies and actions, while likewise potentially deceptive and undermining their efforts from within. The recommendations emphasizes the use of strategic deceptiveness and adjustment in warfare.