《贞观政要·卷四·教戒太子诸王》
贞观十年，唐太宗对房玄龄说： 我看历代平乱创业的帝王，都生长在民间，都通情达理，能识别人情真假，少有导致败亡的。
贞观十年，太宗谓房玄龄曰： 朕历观前代拨乱创业之主，生长民间，皆识达情伪，罕至于败亡。
In the tenth year of Zhenguan, Emperor Taizong of Tang said to Fang Xuanling: I believe that the emperors who have succeeded in putting down chaos and founding a cause in past dynasties were all born among the people, were reasonable, and could recognize the truth of human feelings. There were few who led to ruin.