《尉缭子·制谈》
所以说，改善我们的武器装备，培养我们的战斗作风，军队一旦出动，就象鸷鸟捕食那样凶猛，象倾泻到深谷的急流那样势不可当。
故曰：便吾器用，养吾武勇，发之如鸟击，如赴千仞之溪。
So we can say that if we improve our weapons and equipment and cultivate our fighting style, once the army is dispatched, it will be as fierce as a bird of prey when it catches its prey, or as irresistible as a rapid flow pouring into a deep valley.