《旧唐书·本纪·卷十八》
寒门出身的人即令有超出众人的才华，登第之后，才能懂得一个班列、一个级别，当然不能熟悉了。
寒士纵有出人之才，登第之后，始得一班一级，固不能熟习也。
Even if people from humble families have outstanding talents, they can only understand one class and one level after they pass the imperial examination. Of course, they cannot be familiar with the court.