《孙膑兵法·客主人分》
所以说，英明的君王和懂得用兵规律的将领必定事先交战之前就有把握取胜，这样的君王和将领就能万无一失；而在交战之中能取胜，出兵之后能建功立业，退兵之时不受损伤的将领，那就只能算是明白用兵的人而已。
故明主、知道之将必先□，可有功于未战之前，故不失；可有之功于已战之后，故兵出而有功，入而不伤，则明于兵者也。
Therefore, a wise monarch and a general who understands the laws of military strategy must be sure to win before the battle. Such a monarch and general can be foolproof; and a general who can win in battle, make achievements after sending troops, and not be damaged when retreating troops is just capable of military strategy.