《贞观政要·卷三·论择官》
朝廷千万不要只注意皇帝身边大臣的选拔，而忽视州县两级主要官员的选拔。
朝廷必不可独重内臣，外刺史、县令，遂轻其选。
The imperial court must never pay attention to the selection of ministers around the emperor, but ignore the selection of key officials at the prefecture and county levels.