《资治通鉴·唐纪·唐纪十一》
魏徵说： 自古以来的帝王，莫不是从艰难境地取得天下，又于安逸中失去天下，守成更难！ 
魏征曰： 自古帝王，莫不得之于艰难，失之于安逸，守成难矣。 
Wei Zheng said: “Since ancient times, emperors have always gained the world from a difficult situation and lost the world in comfort. Preserving it is more difficult!”