《贞观政要·卷三·论封建》
等到隋炀帝即位，世道败坏、道德沦丧，当时的人物，几乎全都被摧毁。虽然陛下用自己天赋的神勇，平定了四方祸乱，然而战争的创伤并未愈合，百姓的疲弊也尚未安宁。
及大业嗣立，世道交丧，一时一物，扫地将尽，虽天纵神武，削平寇虐，兵威不息，劳止未康。
When Emperor Yang of Sui ascended to the throne, the social morality had been corrupted and the society's ethics had declined. Almost all the outstanding figures at that time were destroyed. Even though with His Majesty's extraordinary talents, you pacified the chaos in all directions, the trauma of war had not yet healed, and the common people had not yet settled down from their weary life.