《淮南子·兵略训》
从天而降的神兵使敌人抬头看不见天、低头看不到地，完全没了方向，手不知挥动长矛，刀剑来不及拔出；攻击迅猛如雷鸣，逼迫气势如狂风；像火势一样蔓延，像波涛一样汹涌。这样使敌人静止时不知如何防守，行动时不知如何来操作。
当此之时，仰不见天，俯不见地，手不麾戈，兵不尽拔，击之若雷，薄之若风，炎之若火，凌之若波，敌之静不知其所守，动不知其所为。
Divine troops that descend from the sky let the enemy not see the sky when they look up nor see the earth when they look down, making them completely lose their bearings. Their hands do not know how to brandish the long spears, and their swords and sabers do not have time to be drawn; the attack is as swift as thunder, and the pressure is as strong as the forceful wind; they spread like fire and surge like waves. This makes the enemy stand still and not know how to defend, and move and not know how to operate.