[ss.12—14arerepeatedinchap.XI.ss.52.]
15.Inwar，practicedissimulation，andyouwillsucceed.
[InthetacticsofTurenne，deceptionoftheenemy，especiallyastothenumericalstrengthofhistroops，tookaveryprominentposition.[2]]
16.Whethertoconcentrateortodivideyourtroops，mustbedecidedbycircumstances.
17.Letyourrapiditybethatofthewind，[Thesimileisdoublyappropriate，becausethewindisnotonlyswiftbut，asMeiYao—ch`enpointsout，\"invisibleandleavesnotracks.\"]