《孟子·离娄章句上·第一节》
所以说，城郭不完备，武器不充足，并不是国家的灾害；土地没有开垦，财物没有积聚，也不是国家的祸害；在上者没有社会行为规范，在下者就没有可学的，坏人横行，国家的灭亡就指日可待了。
故曰：城郭不完，兵甲不多，非国之灾也；田野不辟，货财不聚，非国之害也。上无礼，下无学，贼民兴，丧无日矣。
Therefore, it is said, the city walls not being finished, and the weapons not being sufficient, are not disasters for the nation; the land not being cultivated, and the goods not being accumulated, are not calamities for the nation; without proper social rules for those above, there is nothing for those below to learn, and with villains running wild, the state is in imminent danger.