《宋史·列传·卷九十七》
三代的制度，兵农合一，到秦朝才分为二，等到唐朝中叶，把府兵全部改变为长征健儿，自从那时以来，百姓不知道当兵，当兵的也不知道务农，农民出粮食布帛养活军队，军队出性命保卫农民，天下都感到方便。
自尔以来，民不知兵，兵不知农，农出谷帛以养兵，兵出性命以卫农，天下便之。
During the Three Dynasties, soldiers and farmers were one and the same, and weren't separated until the Qin Dynasty. When the mid-Tang Dynasty arrived, all the government soldiers were changed into long-term military personnel, since then, the common people did not know what military service was, and military personnel did not know what farming was, farmers provided the military with food and cloth, and military personnel protected farmers with their lives. Everyone felt at ease.