《资治通鉴·汉纪·汉纪七》
 尽管如此，刀兵是不祥之物，战争是凶险之事；由大变小，由强变弱，瞬息之间就会发生。
虽然，兵，凶器；战，危事也。故以大为小，以强为弱，在俛仰之间耳。
Despite this, weapons are inauspicious objects, and war is a dangerous thing; changes from large to small, from strong to weak, happen in an instant.