《六韬·武韬·文伐》
暗中收纳敌国的智谋之士，使他与自己图谋大计；秘密结交敌国勇士，借以鼓舞我方的士气。
阴纳智士，使图其计；纳勇士，使高其气。
Secretly accommodate the enemy's wise men and make him plan with him; make secret friends with the enemy warriors to boost the morale of our side.